diff --git a/src/loader.js b/src/loader.js
index 21dc7bd..6f2076c 100644
--- a/src/loader.js
+++ b/src/loader.js
@@ -740,19 +740,14 @@ function logloads(loads) {
       if (typeof obj != 'object')
         throw new TypeError('Expected object');
 
-      // we do this to be able to tell if a module is a module privately in ES5
-      // by doing m instanceof Module
       var m = new Module();
 
-      var pNames;
-      if (Object.getOwnPropertyNames && obj != null) {
+      var pNames = [];
+      if (Object.getOwnPropertyNames && obj != null)
         pNames = Object.getOwnPropertyNames(obj);
-      }
-      else {
-        pNames = [];
+      else
         for (var key in obj)
           pNames.push(key);
-      }
 
       for (var i = 0; i < pNames.length; i++) (function(key) {
         defineProperty(m, key, {
@@ -764,9 +759,6 @@ function logloads(loads) {
         });
       })(pNames[i]);
 
-      if (Object.preventExtensions)
-        Object.preventExtensions(m);
-
       return m;
     },
     // 26.3.3.14