diff --git a/Resources/Scripts/update.js b/Resources/Scripts/update.js
index 98004246..5c76cd79 100644
--- a/Resources/Scripts/update.js
+++ b/Resources/Scripts/update.js
@@ -146,7 +146,7 @@
         createUpdateNotificationElement(tagName, obj.browser_download_url);
       }
       
-      if (eventID !== 0){
+      if (eventID){ // ignore undefined and 0
         $TDU.onUpdateCheckFinished(eventID, hasUpdate, tagName);
       }
     });