diff --git a/src/notifications.js b/src/notifications.js
index ecfbcbd569..b76863e7e5 100644
--- a/src/notifications.js
+++ b/src/notifications.js
@@ -396,7 +396,7 @@ var async = require('async'),
 
 				// Filter out duplicates
 				notifications = notifications.filter(function(notifObj, idx) {
-					if (!notifObj.mergeId) {
+					if (!notifObj || !notifObj.mergeId) {
 						return true;
 					}