diff --git a/angular-translate/angular-translate-tests.ts b/angular-translate/angular-translate-tests.ts
index cc02a85d6a..c60247f427 100644
--- a/angular-translate/angular-translate-tests.ts
+++ b/angular-translate/angular-translate-tests.ts
@@ -2,6 +2,14 @@
 
 var app = angular.module('at', ['pascalprecht.translate']);
 
+app.factory('customLoader', ($q:angular.IQService) => {
+    return (options:any) => {
+        var dfd:angular.IDeferred<string> = $q.defer();
+        dfd.resolve('whatever you wanted to translate, I simply know nothing about the language with the key ' + options.key);
+        return dfd.promise;
+    }
+});
+
 app.config(($translateProvider: angular.translate.ITranslateProvider) => {
     $translateProvider.translations('en', {
         TITLE: 'Hello',
@@ -16,6 +24,8 @@ app.config(($translateProvider: angular.translate.ITranslateProvider) => {
         BUTTON_LANG_DE: 'deutsch'
     });
     $translateProvider.preferredLanguage('en');
+
+    $translateProvider.useLoader('customLoader');
 });
 
 interface Scope extends ng.IScope {
diff --git a/angular-translate/angular-translate.d.ts b/angular-translate/angular-translate.d.ts
index 1abb13ae81..ab4c1db5f5 100644
--- a/angular-translate/angular-translate.d.ts
+++ b/angular-translate/angular-translate.d.ts
@@ -93,7 +93,7 @@ declare module angular.translate {
         storageKey(key: string): void; // JeroMiya - the library should probably return ITranslateProvider but it doesn't here
         useUrlLoader(url: string): ITranslateProvider;
         useStaticFilesLoader(options: IStaticFilesLoaderOptions): ITranslateProvider;
-        useLoader(loaderFactory: string, options: any): ITranslateProvider;
+        useLoader(loaderFactory: string, options?: any): ITranslateProvider;
         useLocalStorage(): ITranslateProvider;
         useCookieStorage(): ITranslateProvider;
         useStorage(storageFactory: any): ITranslateProvider;