diff --git a/js/ui/messageTray.js b/js/ui/messageTray.js
index 114645885..c3eb706f9 100644
--- a/js/ui/messageTray.js
+++ b/js/ui/messageTray.js
@@ -49,7 +49,7 @@ const State = {
 const NotificationDestroyedReason = {
     EXPIRED: 1,
     DISMISSED: 2,
-    SOURCE_CLOSED 3
+    SOURCE_CLOSED: 3
 };
 
 // Message tray has its custom Urgency enumeration. LOW, NORMAL and CRITICAL