diff --git a/source/duke3d/src/game.cpp b/source/duke3d/src/game.cpp
index 470ede9b6..7d0529792 100644
--- a/source/duke3d/src/game.cpp
+++ b/source/duke3d/src/game.cpp
@@ -4260,7 +4260,7 @@ skip:
 #ifdef LUNATIC
         bool const haveAction = false; // FIXME!
 #else
-        bool const haveAction = scrofs_action != 0 && (unsigned)scrofs_action + ACTION_PARAM_COUNT > (unsigned)g_scriptSize;
+        bool const haveAction = scrofs_action != 0 && (unsigned)scrofs_action + ACTION_PARAM_COUNT <= (unsigned)g_scriptSize;
 #endif
 
         switch (DYNAMICTILEMAP(pSprite->picnum))