diff --git a/src/script/api/script_list.cpp b/src/script/api/script_list.cpp
--- a/src/script/api/script_list.cpp
+++ b/src/script/api/script_list.cpp
@@ -745,7 +745,7 @@ SQInteger ScriptList::_get(HSQUIRRELVM v
 SQInteger ScriptList::_set(HSQUIRRELVM vm)
 {
 	if (sq_gettype(vm, 2) != OT_INTEGER) return SQ_ERROR;
-	if (sq_gettype(vm, 3) != OT_INTEGER || sq_gettype(vm, 3) == OT_NULL) {
+	if (sq_gettype(vm, 3) != OT_INTEGER && sq_gettype(vm, 3) != OT_NULL) {
 		return sq_throwerror(vm, _SC("you can only assign integers to this list"));
 	}