diff --git a/src/ng/directive/input.js b/src/ng/directive/input.js
index cb432c52a5c7..b8ed9e319662 100644
--- a/src/ng/directive/input.js
+++ b/src/ng/directive/input.js
@@ -1202,7 +1202,7 @@ function radioInputType(scope, element, attr, ctrl) {
 
   ctrl.$render = function() {
     var value = attr.value;
-    element[0].checked = (value == ctrl.$viewValue);
+    element[0].checked = angular.equals(value, ctrl.$viewValue);
   };
 
   attr.$observe('value', ctrl.$render);