diff --git a/js/ui/notificationDaemon.js b/js/ui/notificationDaemon.js index 1bd57c333..dc8f08d6f 100644 --- a/js/ui/notificationDaemon.js +++ b/js/ui/notificationDaemon.js @@ -246,7 +246,8 @@ NotificationDaemon.prototype = { _onFocusAppChanged: function() { let tracker = Shell.WindowTracker.get_default(); - Main.messageTray.removeSourceByApp(tracker.focus_app); + if (tracker.focus_app) + Main.messageTray.removeSourceByApp(tracker.focus_app); }, _actionInvoked: function(notification, action, source, id) {