diff --git a/src/views/activity.js b/src/views/activity.js
index c6d5e7a68..fb9f00bb8 100644
--- a/src/views/activity.js
+++ b/src/views/activity.js
@@ -245,15 +245,19 @@ angular.module('Application').controller('ActivityController', ['$scope', '$loca
 
         case ACTION_APP_LOGIN:
             var app = Client.getCachedAppSync(data.appId);
+            if (!app) return '';
             return 'App ' + app.fqdn + ' logged in';
 
         case ACTION_APP_OOM:
+            if (!data.app) return '';
             return data.app.manifest.title + ' ran out of memory';
 
         case ACTION_APP_DOWN:
+            if (!data.app) return '';
             return data.app.manifest.title + ' is down';
 
         case ACTION_APP_UP:
+            if (!data.app) return '';
             return data.app.manifest.title + ' is back online';
 
         case ACTION_BACKUP_START: