diff --git a/polymer/eduke32/source/game.c b/polymer/eduke32/source/game.c
index 635fa68ea..f7d68f45d 100644
--- a/polymer/eduke32/source/game.c
+++ b/polymer/eduke32/source/game.c
@@ -106,10 +106,6 @@ int32_t voting = -1;
 int32_t vote_map = -1, vote_episode = -1;
 
 static int32_t g_Debug = 0;
-
-extern int32_t rts_numlumps;
-
-
 static int32_t g_noLogoAnim = 0;
 static int32_t g_noLogo = 0;
 
@@ -6164,7 +6160,7 @@ PALONLY:
             }
             */
 
-            if (t4 && t4 != 1)
+            if ((intptr_t *)t4 >= &script[0] && (intptr_t *)t4 <= (&script[0]+g_scriptSize))
             {
                 l = *(((intptr_t *)t4)+2); //For TerminX: was *(int32_t *)(t4+8)
 
diff --git a/polymer/eduke32/source/rts.h b/polymer/eduke32/source/rts.h
index 2820afc9f..c0207b983 100644
--- a/polymer/eduke32/source/rts.h
+++ b/polymer/eduke32/source/rts.h
@@ -30,6 +30,7 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 #define __rts_public__
 
 extern char rts_lumplockbyte[11];
+extern int32_t rts_numlumps;
 
 /*
 ====================