diff --git a/angular-translate/angular-translate.d.ts b/angular-translate/angular-translate.d.ts
index 045f2f5994..51946281ce 100644
--- a/angular-translate/angular-translate.d.ts
+++ b/angular-translate/angular-translate.d.ts
@@ -72,7 +72,7 @@ declare namespace angular.translate {
     }
 
     interface ITranslateProvider extends angular.IServiceProvider {
-        translations(): ITranslationTable;
+        translations(key?: string): ITranslationTable;
         translations(key: string, translationTable: ITranslationTable): ITranslateProvider;
         cloakClassName(): string;
         cloakClassName(name: string): ITranslateProvider;