diff --git a/tracker/src/engagement.js b/tracker/src/engagement.js
index c4a6ab9e55c8..1dba2e5c4f62 100644
--- a/tracker/src/engagement.js
+++ b/tracker/src/engagement.js
@@ -9,7 +9,7 @@ import { sendRequest } from './networking'
 var listeningOnEngagement = false
 
 var currentEngagementIgnored
-var currentEngagementURL = location.href
+var currentEngagementURL
 var currentEngagementProps = {}
 var currentEngagementMaxScrollDepth = -1