diff --git a/lib/ads/client_side_ad_manager.js b/lib/ads/client_side_ad_manager.js
index eb0f4f4f8b..580d9ab2f1 100644
--- a/lib/ads/client_side_ad_manager.js
+++ b/lib/ads/client_side_ad_manager.js
@@ -79,9 +79,9 @@ shaka.ads.ClientSideAdManager = class {
         });
 
     // Notify the SDK when the video has ended, so it can play post-roll ads.
-    this.video_.onended = () => {
+    this.eventManager_.listen(this.video_, 'ended', () => {
       this.adsLoader_.contentComplete();
-    };
+    });
   }
 
   /**