diff --git a/polymer/eduke32/build/include/compat.h b/polymer/eduke32/build/include/compat.h
index 7728860f0..add4e02fa 100644
--- a/polymer/eduke32/build/include/compat.h
+++ b/polymer/eduke32/build/include/compat.h
@@ -728,5 +728,16 @@ static inline char *Bstrncpyz(char *dst, const char *src, bsize_t n)
 #define initprintf_nowarn(fmt, ...) NOWARN(initprintf, fmt, ## __VA_ARGS__)
 #define message_nowarn(fmt, ...) NOWARN(message, fmt, ## __VA_ARGS__)
 
+/* Static assertions, based on source found in LuaJIT's src/lj_def.h. */
+#define EDUKE32_ASSERT_NAME2(name, line) name ## line
+#define EDUKE32_ASSERT_NAME(line) EDUKE32_ASSERT_NAME2(eduke32_assert_, line)
+#ifdef __COUNTER__
+# define EDUKE32_STATIC_ASSERT(cond) \
+    extern void EDUKE32_ASSERT_NAME(__COUNTER__)(int STATIC_ASSERTION_FAILED[(cond)?1:-1])
+#else
+# define EDUKE32_STATIC_ASSERT(cond) \
+    extern void EDUKE32_ASSERT_NAME(__LINE__)(int STATIC_ASSERTION_FAILED[(cond)?1:-1])
+#endif
+
 #endif // __compat_h__
 
diff --git a/polymer/eduke32/source/animvpx.c b/polymer/eduke32/source/animvpx.c
index 6f6396e09..8a19df028 100644
--- a/polymer/eduke32/source/animvpx.c
+++ b/polymer/eduke32/source/animvpx.c
@@ -28,12 +28,12 @@ const char *animvpx_read_ivf_header_errmsg[] = {
     "invalid framerate numerator or denominator after correction, must not be 0",
 };
 
+EDUKE32_STATIC_ASSERT(sizeof(animvpx_ivf_header_t) == 32);
+
 int32_t animvpx_read_ivf_header(int32_t inhandle, animvpx_ivf_header_t *hdr)
 {
     int32_t err;
 
-    Bassert(sizeof(animvpx_ivf_header_t) == 32);
-
     if (kread(inhandle, hdr, sizeof(animvpx_ivf_header_t)) != sizeof(animvpx_ivf_header_t))
         return 1;  // "couldn't read header"
 
diff --git a/polymer/eduke32/source/game.c b/polymer/eduke32/source/game.c
index 24ad0215b..75d234fcc 100644
--- a/polymer/eduke32/source/game.c
+++ b/polymer/eduke32/source/game.c
@@ -10113,6 +10113,9 @@ void G_MaybeAllocPlayer(int32_t pnum)
 #endif
 }
 
+EDUKE32_STATIC_ASSERT(sizeof(actor_t)==128);
+EDUKE32_STATIC_ASSERT(sizeof(DukePlayer_t)%4 == 0);
+
 int32_t app_main(int32_t argc, const char **argv)
 {
     int32_t i = 0, j;
@@ -10124,9 +10127,6 @@ int32_t app_main(int32_t argc, const char **argv)
     ENetCallbacks callbacks = { NULL, NULL, NULL };
 #endif
 
-    Bassert(sizeof(actor_t)==128);
-    Bassert(sizeof(DukePlayer_t)%4 == 0);
-
     G_ExtPreInit();
 
 #ifdef _WIN32
diff --git a/polymer/eduke32/source/gamedef.c b/polymer/eduke32/source/gamedef.c
index e69b544bb..341e7efa2 100644
--- a/polymer/eduke32/source/gamedef.c
+++ b/polymer/eduke32/source/gamedef.c
@@ -6119,9 +6119,7 @@ void C_InitProjectiles(void)
         0, 1, 32, {0,0,0,0,0,0},
     };
 
-    // this will only happen if I forget to update this function...
-    if (sizeof(projectile_t) != sizeof(DefaultProjectile))
-        G_GameExit("ERROR: C_InitProjectiles(): projectile_t mismatch!");
+    EDUKE32_STATIC_ASSERT(sizeof(projectile_t) == sizeof(DefaultProjectile));
 
     for (i=MAXTILES-1; i>=0; i--)
     {
diff --git a/polymer/eduke32/source/savegame.c b/polymer/eduke32/source/savegame.c
index d1fa081be..f75cd0639 100644
--- a/polymer/eduke32/source/savegame.c
+++ b/polymer/eduke32/source/savegame.c
@@ -1126,13 +1126,13 @@ static int32_t doallocsnap(int32_t allocinit)
 }
 
 
+EDUKE32_STATIC_ASSERT(sizeof(savehead_t) == 310);
+
 // make snapshot only if spot < 0 (demo)
 int32_t sv_saveandmakesnapshot(FILE *fil, int8_t spot, int8_t recdiffsp, int8_t diffcompress, int8_t synccompress)
 {
     savehead_t h;
 
-    Bassert(sizeof(savehead_t) == 310);
-
     // set a few savegame system globals
     savegame_comprthres = SV_DEFAULTCOMPRTHRES;
     savegame_diffcompress = diffcompress;
@@ -1237,13 +1237,14 @@ int32_t sv_saveandmakesnapshot(FILE *fil, int8_t spot, int8_t recdiffsp, int8_t
     return 0;
 }
 
+
+EDUKE32_STATIC_ASSERT(sizeof(savehead_t) == 310);
+
 // if file is not an EDuke32 savegame/demo, h->headerstr will be all zeros
 int32_t sv_loadheader(int32_t fil, int32_t spot, savehead_t *h)
 {
     int32_t havedemo = (spot < 0);
 
-    Bassert(sizeof(savehead_t) == 310);
-
     if (kread(fil, h, sizeof(savehead_t)) != sizeof(savehead_t))
     {
         OSD_Printf("%s %d header corrupt.\n", havedemo ? "Demo":"Savegame", havedemo ? -spot : spot);