diff --git a/hscript/CustomClass.hx b/hscript/CustomClass.hx
index 8e06a35..d549ba4 100644
--- a/hscript/CustomClass.hx
+++ b/hscript/CustomClass.hx
@@ -87,7 +87,7 @@ class CustomClass implements IHScriptCustomClassBehaviour {
 			return;
 		}
 
-		if (__class.cl == CustomClassHandler) {
+		if (__class.cl is CustomClassHandler) {
 			__superClass = new CustomClass(__class.cl, args);
 			@:privateAccess
 			__interp.__instanceFields.concat(__superClass.__class__fields);