diff --git a/app/modules/ads.js b/app/modules/ads.js
index e7abdc6228e..f1051cc19e5 100644
--- a/app/modules/ads.js
+++ b/app/modules/ads.js
@@ -1,5 +1,6 @@
 /* eslint no-console: 0 */
 import config from '../config/environment';
+import {Promise} from 'rsvp';
 
 /**
  * @typedef {Object} SlotsContext