diff --git a/src/ng/directive/input.js b/src/ng/directive/input.js
index da3b4944d45f..7b5882d48942 100644
--- a/src/ng/directive/input.js
+++ b/src/ng/directive/input.js
@@ -1753,7 +1753,9 @@ function radioInputType(scope, element, attr, ctrl) {
 
   ctrl.$render = function() {
     var value = attr.value;
-    element[0].checked = (value === ctrl.$viewValue);
+    // We generally use strict comparison. This is behavior we cannot change without a BC.
+    // eslint-disable-next-line eqeqeq
+    element[0].checked = (value == ctrl.$viewValue);
   };
 
   attr.$observe('value', ctrl.$render);
diff --git a/test/ng/directive/inputSpec.js b/test/ng/directive/inputSpec.js
index 1d81f9a5efcf..1de73f9266b2 100644
--- a/test/ng/directive/inputSpec.js
+++ b/test/ng/directive/inputSpec.js
@@ -3871,6 +3871,17 @@ describe('input', function() {
     });
 
 
+    it('should use non-strict comparison between model and value', function() {
+      $rootScope.selected = false;
+      var inputElm = helper.compileInput('<input type="radio" ng-model="selected" ng-value="false">' +
+                   '<input type="radio" ng-model="selected" ng-value="\'\'">' +
+                   '<input type="radio" ng-model="selected" ng-value="0">');
+
+      expect(inputElm[0].checked).toBe(true);
+      expect(inputElm[1].checked).toBe(true);
+      expect(inputElm[2].checked).toBe(true);
+    });
+
     it('should watch the expression', function() {
       var inputElm = helper.compileInput('<input type="radio" ng-model="selected" ng-value="value">');