diff --git a/Packages/ohif-viewerbase/client/lib/helpers/isDisplaySetActive.js b/Packages/ohif-viewerbase/client/lib/helpers/isDisplaySetActive.js
index 1ea9fe31e..e4409593d 100644
--- a/Packages/ohif-viewerbase/client/lib/helpers/isDisplaySetActive.js
+++ b/Packages/ohif-viewerbase/client/lib/helpers/isDisplaySetActive.js
@@ -1,6 +1,7 @@
 import { Template } from 'meteor/templating';
 import { Session } from 'meteor/session';
 import { $ } from 'meteor/jquery';
+import { _ } from 'meteor/underscore';
 
 import { OHIF } from 'meteor/ohif:core';
 import 'meteor/ohif:viewerbase';