diff --git a/js/js.translator/testFiles/kotlin_lib_ecma5.js b/js/js.translator/testFiles/kotlin_lib_ecma5.js
index f4e5033fe26..4b46588641e 100644
--- a/js/js.translator/testFiles/kotlin_lib_ecma5.js
+++ b/js/js.translator/testFiles/kotlin_lib_ecma5.js
@@ -72,7 +72,7 @@ var Kotlin = Object.create(null);
 
     function computeProto2(bases, properties) {
         if (bases === null) {
-            return null;
+            return Object.prototype;
         }
         return Array.isArray(bases) ? computeProto(bases, properties) : bases.proto;
     }