diff --git a/modules/backend/classes/Controller.php b/modules/backend/classes/Controller.php
index 8a83514d1..d241c1408 100644
--- a/modules/backend/classes/Controller.php
+++ b/modules/backend/classes/Controller.php
@@ -153,8 +153,10 @@ class Controller extends Extendable
         /*
          * Media Manager widget is available on all back-end pages
          */
-        $manager = new MediaManager($this, 'ocmediamanager');
-        $manager->bindToController();
+        if (class_exists('\\Cms\\Widgets\\MediaManager')) {
+            $manager = new MediaManager($this, 'ocmediamanager');
+            $manager->bindToController();
+        }
     }
 
     /**