diff --git a/src/ng/directive/input.js b/src/ng/directive/input.js
index 1d8d14eef6e5..18ff06b1fa4e 100644
--- a/src/ng/directive/input.js
+++ b/src/ng/directive/input.js
@@ -1154,6 +1154,8 @@ var NgModelController = ['$scope', '$exceptionHandler', '$attrs', '$element', '$
         ctrl.$render();
       }
     }
+
+    return value;
   });
 }];
 
diff --git a/test/ng/directive/inputSpec.js b/test/ng/directive/inputSpec.js
index 892c1b7f534d..c568e807d112 100644
--- a/test/ng/directive/inputSpec.js
+++ b/test/ng/directive/inputSpec.js
@@ -383,6 +383,29 @@ describe('ngModel', function() {
       dealoc(element);
     });
   });
+
+  it('should keep previously defined watches consistent when changes in validity are made',
+   inject(function($compile, $rootScope) {
+
+     var isFormValid;
+     $rootScope.$watch('myForm.$valid', function(value) { isFormValid = value; });
+
+     var element = $compile('<form name="myForm">' +
+      '<input  name="myControl" ng-model="value" required >' +
+      '</form>')($rootScope);
+
+     $rootScope.$apply();
+     expect(isFormValid).toBe(false);
+     expect($rootScope.myForm.$valid).toBe(false);
+
+     $rootScope.value='value';
+     $rootScope.$apply();
+     expect(isFormValid).toBe(true);
+     expect($rootScope.myForm.$valid).toBe(true);
+
+     dealoc(element);
+   }));
+
 });