--- a/hedgewars/uScript.pas	Sun Jan 26 10:20:42 2014 +0400
+++ b/hedgewars/uScript.pas	Mon Jan 27 00:33:42 2014 +0400
@@ -270,7 +270,7 @@
     else
         begin
         for i:= 1 to lua_gettop(L) do
-            GameFlags := GameFlags and not(LongWord(lua_tointeger(L, i)));
+            GameFlags := GameFlags and (not LongWord(lua_tointeger(L, i)));
         ScriptSetInteger('GameFlags', GameFlags);
         end;
     lc_disablegameflags:= 0;