diff --git a/functions/sentry-mattermost/function.js b/functions/sentry-mattermost/function.js
index 8f1152a..784aa40 100644
--- a/functions/sentry-mattermost/function.js
+++ b/functions/sentry-mattermost/function.js
@@ -21,7 +21,7 @@ ${
     : ""
 }
 
-url : ${event.request.url}
+${event.request ? `url : ${event.request.url}` : ""}
 
 [See details in sentry](${event.web_url})
 `;