diff --git a/polymer/eduke32/build/include/build.h b/polymer/eduke32/build/include/build.h
index 1f8ced013..da2baedbf 100644
--- a/polymer/eduke32/build/include/build.h
+++ b/polymer/eduke32/build/include/build.h
@@ -803,8 +803,8 @@ int32_t md_loadmodel(const char *fn);
 int32_t md_setmisc(int32_t modelid, float scale, int32_t shadeoff, float zadd, float yoffset, int32_t flags);
 // int32_t md_tilehasmodel(int32_t tilenume, int32_t pal);
 
-extern char *G_DefaultDefFile(void);
-extern char *G_DefFile(void);
+extern const char *G_DefaultDefFile(void);
+extern const char *G_DefFile(void);
 extern char *g_defNamePtr;
 
 extern char **g_defModules;
diff --git a/polymer/eduke32/build/include/osd.h b/polymer/eduke32/build/include/osd.h
index a2c668267..005d18ff7 100644
--- a/polymer/eduke32/build/include/osd.h
+++ b/polymer/eduke32/build/include/osd.h
@@ -108,7 +108,7 @@ int32_t OSD_GetRowsCur(void);
 void OSD_Init(void);
 
 // sets the file to echo output to
-void OSD_SetLogFile(char *fn);
+void OSD_SetLogFile(const char *fn);
 
 // sets the functions the OSD will call to interrogate the environment
 void OSD_SetFunctions(
diff --git a/polymer/eduke32/build/include/polymer.h b/polymer/eduke32/build/include/polymer.h
index 5911d0320..3cb354460 100644
--- a/polymer/eduke32/build/include/polymer.h
+++ b/polymer/eduke32/build/include/polymer.h
@@ -174,10 +174,10 @@ typedef struct      s_prrograminfo {
 
 typedef struct      s_prprogrambit {
     int32_t         bit;
-    char*           vert_def;
-    char*           vert_prog;
-    char*           frag_def;
-    char*           frag_prog;
+    const char*           vert_def;
+    const char*           vert_prog;
+    const char*           frag_def;
+    const char*           frag_prog;
 }                   _prprogrambit;
 
 #include "prlights.h"
diff --git a/polymer/eduke32/build/src/osd.c b/polymer/eduke32/build/src/osd.c
index cebfc90f0..d190ffea1 100644
--- a/polymer/eduke32/build/src/osd.c
+++ b/polymer/eduke32/build/src/osd.c
@@ -774,7 +774,7 @@ void OSD_Init(void)
 //
 // OSD_SetLogFile() -- Sets the text file where printed text should be echoed
 //
-void OSD_SetLogFile(char *fn)
+void OSD_SetLogFile(const char *fn)
 {
     if (osdlog)
     {
diff --git a/polymer/eduke32/build/src/polymer.c b/polymer/eduke32/build/src/polymer.c
index a3a2c1061..ee1d0e03e 100644
--- a/polymer/eduke32/build/src/polymer.c
+++ b/polymer/eduke32/build/src/polymer.c
@@ -4949,7 +4949,7 @@ static void         polymer_compileprogram(int32_t programbits)
 {
     int32_t         i, enabledbits;
     GLhandleARB     vert, frag, program;
-    GLcharARB*      source[PR_BIT_COUNT * 2];
+    const GLcharARB*      source[PR_BIT_COUNT * 2];
     GLcharARB       infobuffer[PR_INFO_LOG_BUFFER_SIZE];
     GLint           linkstatus;
 
@@ -4971,7 +4971,7 @@ static void         polymer_compileprogram(int32_t programbits)
         i++;
     }
 
-    bglShaderSourceARB(vert, enabledbits, (const GLcharARB**)source, NULL);
+    bglShaderSourceARB(vert, enabledbits, source, NULL);
 
     bglCompileShaderARB(vert);
 
diff --git a/polymer/eduke32/source/_functio.h b/polymer/eduke32/source/_functio.h
index 091ad84a0..0758be274 100644
--- a/polymer/eduke32/source/_functio.h
+++ b/polymer/eduke32/source/_functio.h
@@ -217,7 +217,7 @@ const char oldkeydefaults[NUMGAMEFUNCTIONS*3][MAXGAMEFUNCLEN] =
    "Dpad_Aiming", "", "",
    };
 
-static char * mousedefaults[] =
+static const char * mousedefaults[] =
    {
    "Fire",
    "MedKit",
@@ -232,7 +232,7 @@ static char * mousedefaults[] =
    };
 
 
-static char * mouseclickeddefaults[] =
+static const char * mouseclickeddefaults[] =
    {
    "",
    "",
@@ -247,14 +247,14 @@ static char * mouseclickeddefaults[] =
    };
 
 
-static char * mouseanalogdefaults[] =
+static const char * mouseanalogdefaults[] =
    {
    "analog_turning",
    "analog_moving",
    };
 
 
-static char * mousedigitaldefaults[] =
+static const char * mousedigitaldefaults[] =
    {
    "",
    "",
@@ -263,7 +263,7 @@ static char * mousedigitaldefaults[] =
    };
 
 #if defined(GEKKO)
-static char * joystickdefaults[] =
+static const char * joystickdefaults[] =
    {
    "Open", // A
    "Fire", // B
@@ -304,7 +304,7 @@ static char * joystickdefaults[] =
    };
 
 
-static char * joystickclickeddefaults[] =
+static const char * joystickclickeddefaults[] =
    {
    "",
    "",
@@ -345,7 +345,7 @@ static char * joystickclickeddefaults[] =
    };
 
 
-static char * joystickanalogdefaults[] =
+static const char * joystickanalogdefaults[] =
    {
    "analog_strafing",
    "analog_moving",
@@ -366,7 +366,7 @@ static char * joystickanalogdefaults[] =
    };
 
 
-static char * joystickdigitaldefaults[] =
+static const char * joystickdigitaldefaults[] =
    {
    "",
    "",
@@ -386,7 +386,7 @@ static char * joystickdigitaldefaults[] =
    "",
    };
 #else
-static char * joystickdefaults[] =
+static const char * joystickdefaults[] =
    {
    "Fire",
    "Strafe",
@@ -427,7 +427,7 @@ static char * joystickdefaults[] =
    };
 
 
-static char * joystickclickeddefaults[] =
+static const char * joystickclickeddefaults[] =
    {
    "",
    "Inventory",
@@ -468,7 +468,7 @@ static char * joystickclickeddefaults[] =
    };
 
 
-static char * joystickanalogdefaults[] =
+static const char * joystickanalogdefaults[] =
    {
    "analog_turning",
    "analog_moving",
@@ -481,7 +481,7 @@ static char * joystickanalogdefaults[] =
    };
 
 
-static char * joystickdigitaldefaults[] =
+static const char * joystickdigitaldefaults[] =
    {
    "",
    "",
diff --git a/polymer/eduke32/source/astub.c b/polymer/eduke32/source/astub.c
index 74576efa9..031db583e 100644
--- a/polymer/eduke32/source/astub.c
+++ b/polymer/eduke32/source/astub.c
@@ -9617,9 +9617,9 @@ enum
     T_INCLUDEDEFAULT,
 };
 
-int32_t parsegroupfiles(scriptfile *script);
+static int32_t parsegroupfiles(scriptfile *script);
 
-void parsegroupfiles_include(const char *fn, scriptfile *script, char *cmdtokptr)
+static void parsegroupfiles_include(const char *fn, scriptfile *script, const char *cmdtokptr)
 {
     scriptfile *included;
 
@@ -9639,7 +9639,7 @@ void parsegroupfiles_include(const char *fn, scriptfile *script, char *cmdtokptr
     }
 }
 
-int32_t parsegroupfiles(scriptfile *script)
+static int32_t parsegroupfiles(scriptfile *script)
 {
     int32_t tokn;
     char *cmdtokptr;
@@ -10074,7 +10074,7 @@ static int32_t loadtilegroups(const char *fn)
 /// vvv Parse CON files partially to get sound definitions
 static int32_t parseconsounds(scriptfile *script);
 
-static void parseconsounds_include(const char *fn, scriptfile *script, char *cmdtokptr)
+static void parseconsounds_include(const char *fn, scriptfile *script, const char *cmdtokptr)
 {
     scriptfile *included;
 
diff --git a/polymer/eduke32/source/common.c b/polymer/eduke32/source/common.c
index e82c254d7..bd369044b 100644
--- a/polymer/eduke32/source/common.c
+++ b/polymer/eduke32/source/common.c
@@ -16,10 +16,10 @@ int32_t g_gameType = GAMEFLAG_DUKE;
 
 // grp/con/def handling
 
-char *defaultgamegrp[GAMECOUNT] = { "DUKE3D.GRP", "NAM.GRP", "NAPALM.GRP", "WW2GI.GRP" };
-char *defaultdeffilename[GAMECOUNT] = { "duke3d.def", "nam.def", "napalm.def", "ww2gi.def" };
-char *defaultconfilename = "GAME.CON";
-char *defaultgameconfilename[GAMECOUNT] = { "EDUKE.CON", "NAM.CON", "NAPALM.CON", "WW2GI.CON" };
+const char *defaultgamegrp[GAMECOUNT] = { "DUKE3D.GRP", "NAM.GRP", "NAPALM.GRP", "WW2GI.GRP" };
+const char *defaultdeffilename[GAMECOUNT] = { "duke3d.def", "nam.def", "napalm.def", "ww2gi.def" };
+const char *defaultconfilename = "GAME.CON";
+const char *defaultgameconfilename[GAMECOUNT] = { "EDUKE.CON", "NAM.CON", "NAPALM.CON", "WW2GI.CON" };
 
 // g_grpNamePtr can ONLY point to a malloc'd block (length BMAX_PATH)
 char *g_grpNamePtr = NULL;
@@ -49,7 +49,7 @@ void clearScriptNamePtr(void)
     // g_scriptNamePtr assumed to be assigned to right after
 }
 
-char *G_DefaultGrpFile(void)
+const char *G_DefaultGrpFile(void)
 {
     if (DUKE)
         return defaultgamegrp[GAME_DUKE];
@@ -63,7 +63,7 @@ char *G_DefaultGrpFile(void)
 
     return defaultgamegrp[0];
 }
-char *G_DefaultDefFile(void)
+const char *G_DefaultDefFile(void)
 {
     if (DUKE)
         return defaultdeffilename[GAME_DUKE];
@@ -86,7 +86,7 @@ char *G_DefaultDefFile(void)
 
     return defaultdeffilename[0];
 }
-char *G_DefaultConFile(void)
+const char *G_DefaultConFile(void)
 {
     if (DUKE && testkopen(defaultgameconfilename[GAME_DUKE],0))
         return defaultgameconfilename[GAME_DUKE];
@@ -116,21 +116,21 @@ char *G_DefaultConFile(void)
     return defaultconfilename;
 }
 
-char *G_GrpFile(void)
+const char *G_GrpFile(void)
 {
     if (g_grpNamePtr == NULL)
         return G_DefaultGrpFile();
     else
         return g_grpNamePtr;
 }
-char *G_DefFile(void)
+const char *G_DefFile(void)
 {
     if (g_defNamePtr == NULL)
         return G_DefaultDefFile();
     else
         return g_defNamePtr;
 }
-char *G_ConFile(void)
+const char *G_ConFile(void)
 {
     if (g_scriptNamePtr == NULL)
         return G_DefaultConFile();
diff --git a/polymer/eduke32/source/common_game.h b/polymer/eduke32/source/common_game.h
index deaac226f..559b8c258 100644
--- a/polymer/eduke32/source/common_game.h
+++ b/polymer/eduke32/source/common_game.h
@@ -27,19 +27,19 @@ enum Games_t {
     GAMECOUNT
 };
 
-extern char *defaultgamegrp[GAMECOUNT];
-extern char *defaultdeffilename[GAMECOUNT];
-extern char *defaultconfilename;
-extern char *defaultgameconfilename[GAMECOUNT];
+extern const char *defaultgamegrp[GAMECOUNT];
+extern const char *defaultdeffilename[GAMECOUNT];
+extern const char *defaultconfilename;
+extern const char *defaultgameconfilename[GAMECOUNT];
 
 extern char *g_grpNamePtr;
 extern char *g_scriptNamePtr;
 
-extern char *G_DefaultGrpFile(void);
-extern char *G_GrpFile(void);
+extern const char *G_DefaultGrpFile(void);
+extern const char *G_GrpFile(void);
 
-extern char *G_DefaultConFile(void);
-extern char *G_ConFile(void);
+extern const char *G_DefaultConFile(void);
+extern const char *G_ConFile(void);
 
 extern void clearGrpNamePtr(void);
 extern void clearDefNamePtr(void);
diff --git a/polymer/eduke32/source/config.c b/polymer/eduke32/source/config.c
index 279735a7d..f186c40e9 100644
--- a/polymer/eduke32/source/config.c
+++ b/polymer/eduke32/source/config.c
@@ -53,7 +53,7 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
 hashtable_t h_gamefuncs    = { NUMGAMEFUNCTIONS<<1, NULL };
 
-int32_t CONFIG_FunctionNameToNum(char *func)
+int32_t CONFIG_FunctionNameToNum(const char *func)
 {
     int32_t i;
 
@@ -95,7 +95,7 @@ char *CONFIG_FunctionNumToName(int32_t func)
 */
 
 
-int32_t CONFIG_AnalogNameToNum(char *func)
+int32_t CONFIG_AnalogNameToNum(const char *func)
 {
 
     if (!Bstrcasecmp(func,"analog_turning"))
@@ -119,7 +119,7 @@ int32_t CONFIG_AnalogNameToNum(char *func)
 }
 
 
-char *CONFIG_AnalogNumToName(int32_t func)
+const char *CONFIG_AnalogNumToName(int32_t func)
 {
     switch (func)
     {
diff --git a/polymer/eduke32/source/config.h b/polymer/eduke32/source/config.h
index f993e9261..7e6ab524b 100644
--- a/polymer/eduke32/source/config.h
+++ b/polymer/eduke32/source/config.h
@@ -37,10 +37,10 @@ int32_t CONFIG_SetMapBestTime(char *mapname, int32_t tm);
 
 void CONFIG_MapKey(int32_t which, kb_scancode key1, kb_scancode oldkey1, kb_scancode key2, kb_scancode oldkey2);
 
-int32_t CONFIG_FunctionNameToNum(char *func);
+int32_t CONFIG_FunctionNameToNum(const char *func);
 char *CONFIG_FunctionNumToName(int32_t func);
-int32_t CONFIG_AnalogNameToNum(char *func);
-char *CONFIG_AnalogNumToName(int32_t func);
+int32_t CONFIG_AnalogNameToNum(const char *func);
+const char *CONFIG_AnalogNumToName(int32_t func);
 void CONFIG_SetDefaults(void);
 void CONFIG_ReadKeys(void);
 
diff --git a/polymer/eduke32/source/game.c b/polymer/eduke32/source/game.c
index d2b5a62aa..41a02f721 100644
--- a/polymer/eduke32/source/game.c
+++ b/polymer/eduke32/source/game.c
@@ -7358,7 +7358,7 @@ FOUNDCHEAT:
 
                 case CHEAT_MONSTERS:
                 {
-                    char *s[] = { "On", "Off" };
+                    const char *s[] = { "On", "Off" };
 
                     if (++g_noEnemies == 3)
                         g_noEnemies = 0;
@@ -8046,7 +8046,7 @@ FAKE_F3:
 
 static void G_ShowParameterHelp(void)
 {
-    char *s = "Usage: eduke32 [files] [options]\n"
+    const char *s = "Usage: eduke32 [files] [options]\n"
               "Example: eduke32 -q4 -a -m -tx -map nukeland.map\n\n"
               "Files can be *.grp/zip/con/def/rts\n"
               "\n"
@@ -8096,7 +8096,7 @@ static void G_ShowParameterHelp(void)
 
 static void G_ShowDebugHelp(void)
 {
-    char *s = "Usage: eduke32 [files] [options]\n"
+    const char *s = "Usage: eduke32 [files] [options]\n"
               "\n"
               "-a\t\tUse fake player AI (fake multiplayer only)\n"
               "-cachesize #\tSets cache size, in Kb\n"
@@ -8200,7 +8200,7 @@ static int32_t S_DefineMusic(char *ID,char *name)
 
 static int32_t parsedefinitions_game(scriptfile *script, int32_t preload);
 
-static void parsedefinitions_game_include(const char *fn, scriptfile *script, char *cmdtokptr, const int32_t preload)
+static void parsedefinitions_game_include(const char *fn, scriptfile *script, const char *cmdtokptr, const int32_t preload)
 {
     scriptfile *included = scriptfile_fromfile(fn);
 
@@ -10314,7 +10314,7 @@ CLEAN_DIRECTORY:
     if (quitevent) return 4;
 
     {
-        char *defsfile = G_DefFile();
+        const char *defsfile = G_DefFile();
         if (!loaddefinitionsfile(defsfile))
         {
             initprintf("Definitions file \"%s\" loaded.\n",defsfile);
diff --git a/polymer/eduke32/source/gamedef.h b/polymer/eduke32/source/gamedef.h
index 44c99f271..51e2f13ab 100644
--- a/polymer/eduke32/source/gamedef.h
+++ b/polymer/eduke32/source/gamedef.h
@@ -81,7 +81,7 @@ extern intptr_t *g_scriptPtr;
 
 typedef struct
 {
-    char *name;
+    const char *name;
     int32_t lId;
     int32_t flags;
     int32_t maxParm2;
diff --git a/polymer/eduke32/source/jaudiolib/include/music.h b/polymer/eduke32/source/jaudiolib/include/music.h
index f47aa08a4..d0f01c706 100644
--- a/polymer/eduke32/source/jaudiolib/include/music.h
+++ b/polymer/eduke32/source/jaudiolib/include/music.h
@@ -62,7 +62,7 @@ typedef struct
 #define MUSIC_LoopSong ( 1 == 1 )
 #define MUSIC_PlayOnce ( !MUSIC_LoopSong )
 
-char *MUSIC_ErrorString( int32_t ErrorNumber );
+const char *MUSIC_ErrorString( int32_t ErrorNumber );
 int32_t   MUSIC_Init( int32_t SoundCard, int32_t Address );
 int32_t   MUSIC_Shutdown( void );
 void  MUSIC_SetVolume( int32_t volume );
diff --git a/polymer/eduke32/source/jmact/control.h b/polymer/eduke32/source/jmact/control.h
index 487595f43..c08dcb622 100644
--- a/polymer/eduke32/source/jmact/control.h
+++ b/polymer/eduke32/source/jmact/control.h
@@ -202,7 +202,7 @@ void CONTROL_PrintAxes( void );
 #define MAXBOUNDKEYS 256
 
 typedef struct binding {
-    char *key;
+    const char *key;
     char cmd[MAXBINDSTRINGLENGTH];
     char repeat;
     char laststate;
diff --git a/polymer/eduke32/source/jmact/keyboard.c b/polymer/eduke32/source/jmact/keyboard.c
index 1b6083325..4d5b68b47 100644
--- a/polymer/eduke32/source/jmact/keyboard.c
+++ b/polymer/eduke32/source/jmact/keyboard.c
@@ -45,7 +45,7 @@ static int32_t numpad = 0;
 // translation table for taking key names to scancodes and back again
 static struct
 {
-    char *key;
+    const char *key;
     kb_scancode sc;
 } sctokeylut[] =
 {
@@ -233,7 +233,7 @@ void KB_ClearKeysDown(void)
     //bflushchars();
 }
 
-char *KB_ScanCodeToString(kb_scancode scancode)
+const char *KB_ScanCodeToString(kb_scancode scancode)
 {
     uint32_t s;
 
diff --git a/polymer/eduke32/source/jmact/keyboard.h b/polymer/eduke32/source/jmact/keyboard.h
index 80bab1ccb..b5ad6e145 100644
--- a/polymer/eduke32/source/jmact/keyboard.h
+++ b/polymer/eduke32/source/jmact/keyboard.h
@@ -92,7 +92,7 @@ int32_t KB_KeyWaiting( void );         // Checks if a character is waiting in th
 char    KB_Getch( void );              // Gets the next keypress
 void    KB_FlushKeyboardQueue( void ); // Empties the keyboard queue of all waiting characters.
 void    KB_ClearKeysDown( void );      // Clears all keys down flags.
-char *  KB_ScanCodeToString( kb_scancode scancode ); // convert scancode into a string
+const char *  KB_ScanCodeToString( kb_scancode scancode ); // convert scancode into a string
 kb_scancode KB_StringToScanCode( char * string );  // convert a string into a scancode
 void    KB_TurnKeypadOn( void );       // turn the keypad on
 void    KB_TurnKeypadOff( void );      // turn the keypad off
diff --git a/polymer/eduke32/source/jmact/scriplib.c b/polymer/eduke32/source/jmact/scriplib.c
index d9a974a61..c13fb8ffa 100644
--- a/polymer/eduke32/source/jmact/scriplib.c
+++ b/polymer/eduke32/source/jmact/scriplib.c
@@ -814,10 +814,11 @@ void SCRIPT_PutString
     int32_t scripthandle,
     char * sectionname,
     char * entryname,
-    char * string
+    const char * string
 )
 {
-    char *raw,*q,*p;
+    const char *q;
+    char *raw,*p;
     int32_t len = 3;
     if (!string) string = "";
 
diff --git a/polymer/eduke32/source/jmact/scriplib.h b/polymer/eduke32/source/jmact/scriplib.h
index a5d0033b7..25eec2d2c 100644
--- a/polymer/eduke32/source/jmact/scriplib.h
+++ b/polymer/eduke32/source/jmact/scriplib.h
@@ -218,7 +218,7 @@ void SCRIPT_PutString
    int32_t scripthandle,
    char * sectionname,
    char * entryname,
-   char * string
+   const char * string
    );
 
 /*
diff --git a/polymer/eduke32/source/menus.c b/polymer/eduke32/source/menus.c
index e03c26a07..48c73ac09 100644
--- a/polymer/eduke32/source/menus.c
+++ b/polymer/eduke32/source/menus.c
@@ -80,7 +80,10 @@ static int32_t soundbits, soundvoices, soundrate;
 #define NUMDOUBLEMBTNS 3  // # of mouse buttons that can be double-clicked (mouse1 - mouse3)
 #define NUMSINGLEMBTNS 4  // # of mouse buttons that can only be single-clicked (the rest)
 #define NUMMOUSEFUNCTIONS (NUMDOUBLEMBTNS*2+NUMSINGLEMBTNS)
-static char *mousebuttonnames[] = { "Mouse1", "Mouse2", "Mouse3", "Mouse4", "Wheel Up", "Wheel Down", "Mouse5", "Mouse6", "Mouse7", "Mouse8"};
+static const char *mousebuttonnames[] =
+{ "Mouse1", "Mouse2", "Mouse3", "Mouse4", "Wheel Up",
+  "Wheel Down", "Mouse5", "Mouse6", "Mouse7", "Mouse8"
+};
 
 extern int32_t voting;
 
@@ -688,7 +691,7 @@ void M_DisplayMenus(void)
     CACHE1D_FIND_REC *dir;
     int32_t c,x,i;
     int32_t l,m;
-    char *p = NULL;
+    const char *p = NULL;
 
     Net_GetPackets();
 
@@ -839,7 +842,7 @@ void M_DisplayMenus(void)
         c = (320>>1)-120;
         {
             int32_t io, ii, yy = 37, d=c+140, enabled;
-            char *opts[] =
+            const char *opts[] =
             {
                 "Name",
                 "-",
@@ -1043,23 +1046,24 @@ void M_DisplayMenus(void)
 
                     case 1:
                     {
-                        char *s[] = { "Auto","","","","","","","","","Blue","Red","Green","Gray","Dark gray","Dark green","Brown",
-                                      "Dark blue","","","","","Bright red","","Yellow","",""
-                                    };
+                        const char *s[] =
+                            { "Auto","","","","","","","","","Blue","Red","Green","Gray","Dark gray","Dark green","Brown",
+                              "Dark blue","","","","","Bright red","","Yellow","",""
+                            };
                         mgametext(d-50,yy,s[ud.color],MENUHIGHLIGHT(io),2+8+16);
                     }
                     break;
 
                     case 2:
                     {
-                        char *s[] = { "Blue", "Red", "Green", "Gray" };
+                        const char *s[] = { "Blue", "Red", "Green", "Gray" };
                         mgametext(d-50,yy,s[ud.team],MENUHIGHLIGHT(io),2+8+16);
                     }
                     break;
 
                     case 3:
                     {
-                        char *s[] = { "Off", "All weapons", "Bullets only" };
+                        const char *s[] = { "Off", "All weapons", "Bullets only" };
                         mgametext(d-50,yy,s[ud.config.AutoAim],MENUHIGHLIGHT(io),2+8+16);
                     }
                     break;
@@ -2686,7 +2690,7 @@ cheat_for_port_credits:
                     break;
                 case 7:
                 {
-                    char *s[] = { "Off", "On", "Compress" };
+                    const char *s[] = { "Off", "On", "Compress" };
                     enabled = (glusetexcompr && usehightile);
                     if (enabled && x==io)
                     {
@@ -2818,7 +2822,7 @@ cheat_for_port_credits:
 
         {
             int32_t io, ii, yy, d=c+160+40, enabled;
-            char *opts[] =
+            const char *opts[] =
             {
                 "Show setup window at start",
                 "Show crosshair",
@@ -2991,7 +2995,7 @@ cheat_for_port_credits:
 
         {
             int32_t io, ii, yy, d=c+160+40, enabled;
-            char *opts[] =
+            const char *opts[] =
             {
                 "Parental lock",
                 "-",
@@ -3071,7 +3075,7 @@ cheat_for_port_credits:
                     }
                     modval(0,2,(int32_t *)&ud.drawweapon,1,probey==io);
                     {
-                        char *s[] = { "Off", "On", "Icon only" };
+                        const char *s[] = { "Off", "On", "Icon only" };
                         mgametextpal(d,yy, s[ud.drawweapon], MENUHIGHLIGHT(io), 0);
                         break;
                     }
@@ -3092,7 +3096,7 @@ cheat_for_port_credits:
                     }
                     modval(0,2,(int32_t *)&ud.autovote,1,probey==io);
                     {
-                        char *s[] = { "Off", "Vote No", "Vote Yes" };
+                        const char *s[] = { "Off", "Vote No", "Vote Yes" };
                         mgametextpal(d,yy, s[ud.autovote], MENUHIGHLIGHT(io), 0);
                         break;
                     }
@@ -3965,7 +3969,7 @@ cheat_for_port_credits:
         }
         else if (function == 2)
         {
-            static char *directions[] =
+            static const char *directions[] =
             {
                 "Up", "Right", "Down", "Left"
             };
@@ -4217,7 +4221,7 @@ cheat_for_port_credits:
             }
             else
             {
-                static char *directions[] =
+                static const char *directions[] =
                 {
                     "Up", "Right", "Down", "Left"
                 };
@@ -4510,7 +4514,7 @@ cheat_for_port_credits:
 
         {
             int32_t io, ii, yy, d=c+160+40, enabled, j;
-            char *opts[] =
+            const char *opts[] =
             {
                 "Sound",
                 "Sound volume",
diff --git a/polymer/eduke32/source/namesdyn.c b/polymer/eduke32/source/namesdyn.c
index 86e6a9f60..7c5a48510 100644
--- a/polymer/eduke32/source/namesdyn.c
+++ b/polymer/eduke32/source/namesdyn.c
@@ -38,7 +38,7 @@ int16_t DynamicTileMap[MAXTILES];
 
 struct dynitem
 {
-    char *str;
+    const char *str;
     int32_t *dynvalptr;
     const int16_t staticval;
 };
diff --git a/polymer/eduke32/source/osdcmds.c b/polymer/eduke32/source/osdcmds.c
index a4f80dc7a..56cbb1f3d 100644
--- a/polymer/eduke32/source/osdcmds.c
+++ b/polymer/eduke32/source/osdcmds.c
@@ -854,7 +854,11 @@ keydef_t ConsoleKeys[]=
     {0,0}
 };
 
-char *ConsoleButtons[] = { "mouse1", "mouse2", "mouse3", "mouse4", "mwheelup", "mwheeldn", "mouse5", "mouse6", "mouse7", "mouse8" };
+const char *ConsoleButtons[] =
+{
+    "mouse1", "mouse2", "mouse3", "mouse4", "mwheelup",
+    "mwheeldn", "mouse5", "mouse6", "mouse7", "mouse8"
+};
 
 static int32_t osdcmd_bind(const osdfuncparm_t *parm)
 {
diff --git a/polymer/eduke32/source/osdcmds.h b/polymer/eduke32/source/osdcmds.h
index 53590af6e..c4adfdfc4 100644
--- a/polymer/eduke32/source/osdcmds.h
+++ b/polymer/eduke32/source/osdcmds.h
@@ -38,12 +38,12 @@ extern float r_ambientlight,r_ambientlightrecip;
 #pragma pack(push,1)
 // key bindings stuff
 typedef struct {
-    char *name;
+    const char *name;
     int32_t id;
 } keydef_t;
 
 extern keydef_t ConsoleKeys[];
-extern char *ConsoleButtons[];
+extern const char *ConsoleButtons[];
 #pragma pack(pop)
 
 #endif	// __osdcmds_h__
diff --git a/polymer/eduke32/source/premap.c b/polymer/eduke32/source/premap.c
index 558445fa4..e18373441 100644
--- a/polymer/eduke32/source/premap.c
+++ b/polymer/eduke32/source/premap.c
@@ -338,7 +338,7 @@ static void G_PrecacheSounds(void)
         }
 }
 
-static void G_DoLoadScreen(char *statustext, int32_t percent)
+static void G_DoLoadScreen(const char *statustext, int32_t percent)
 {
     int32_t i=0,j;
 
diff --git a/polymer/eduke32/source/sdlmusic.c b/polymer/eduke32/source/sdlmusic.c
index d883c05c5..441beb9e9 100644
--- a/polymer/eduke32/source/sdlmusic.c
+++ b/polymer/eduke32/source/sdlmusic.c
@@ -75,7 +75,7 @@ static void setErrorMessage(const char *msg)
 
 // The music functions...
 
-char *MUSIC_ErrorString(int32_t ErrorNumber)
+const char *MUSIC_ErrorString(int32_t ErrorNumber)
 {
     switch (ErrorNumber)
     {