diff --git a/desktop_version/src/Map.cpp b/desktop_version/src/Map.cpp
index 0cb8d431..5a96f941 100644
--- a/desktop_version/src/Map.cpp
+++ b/desktop_version/src/Map.cpp
@@ -1773,7 +1773,10 @@ void mapclass::loadlevel(int rx, int ry)
 				break;
 				}
 				case 19: //Script Box
-				game.customscript[tempscriptbox]=edentity[edi].scriptname;
+				if (INBOUNDS_ARR(tempscriptbox, game.customscript))
+				{
+					game.customscript[tempscriptbox]=edentity[edi].scriptname;
+				}
 				obj.createblock(1, (edentity[edi].x*8)- ((rx-100)*40*8), (edentity[edi].y*8)- ((ry-100)*30*8),
 								edentity[edi].p1*8, edentity[edi].p2*8, 300+tempscriptbox, "custom_" + edentity[edi].scriptname);
 				tempscriptbox++;