diff --git a/angularjs/angular-resource-tests.ts b/angularjs/angular-resource-tests.ts
index cfa7712cc2..fcf0bd0a96 100644
--- a/angularjs/angular-resource-tests.ts
+++ b/angularjs/angular-resource-tests.ts
@@ -89,6 +89,9 @@ resource = resourceClass.save({ key: 'value' }, { key: 'value' }, function () {
 
 var promise : angular.IPromise<IMyResource>;
 var arrayPromise : angular.IPromise<IMyResource[]>;
+var json: {
+  [index: string]: any;
+};
 
 promise = resource.$delete();
 promise = resource.$delete({ key: 'value' });
@@ -127,6 +130,8 @@ promise = resource.$save(function () { });
 promise = resource.$save(function () { }, function () { });
 promise = resource.$save({ key: 'value' }, function () { }, function () { });
 
+json    = resource.toJSON();
+
 ///////////////////////////////////////
 // IResourceService
 ///////////////////////////////////////
diff --git a/angularjs/angular-resource.d.ts b/angularjs/angular-resource.d.ts
index 76930196ba..2187130ac9 100644
--- a/angularjs/angular-resource.d.ts
+++ b/angularjs/angular-resource.d.ts
@@ -136,6 +136,9 @@ declare module angular.resource {
         /** the promise of the original server interaction that created this instance. **/
         $promise : angular.IPromise<T>;
         $resolved : boolean;
+        toJSON: () => {
+          [index: string]: any;
+        }
     }
 
     /**