diff --git a/frontend/app/angular-modules.ts b/frontend/app/angular-modules.ts
index 9b336964da..6f7fc2472e 100644
--- a/frontend/app/angular-modules.ts
+++ b/frontend/app/angular-modules.ts
@@ -137,7 +137,7 @@ angular.module('openproject.layout', [
 ]);
 angular.module('openproject.layout.controllers', []);
 
-angular.module('openproject.api', ['restangular', 'openproject.services']);
+angular.module('openproject.api', ['restangular', 'openproject', 'openproject.services']);
 
 angular.module('openproject.templates', []);