diff --git a/src/Angular.js b/src/Angular.js
index f8678aa09c64..097f2977c036 100644
--- a/src/Angular.js
+++ b/src/Angular.js
@@ -272,13 +272,7 @@ function forEach(obj, iterator, context) {
 }
 
 function sortedKeys(obj) {
-  var keys = [];
-  for (var key in obj) {
-    if (obj.hasOwnProperty(key)) {
-      keys.push(key);
-    }
-  }
-  return keys.sort();
+  return Object.keys(obj).sort();
 }
 
 function forEachSorted(obj, iterator, context) {