diff --git a/modules/backend/classes/Controller.php b/modules/backend/classes/Controller.php
index bdb91acb7..3410281e2 100644
--- a/modules/backend/classes/Controller.php
+++ b/modules/backend/classes/Controller.php
@@ -555,6 +555,13 @@ class Controller extends Extendable
             }
         }
 
+        /*
+         * Generic handler that does nothing
+         */
+        if ($handler == 'onAjax') {
+            return true;
+        }
+
         return false;
     }
 
diff --git a/modules/cms/classes/Controller.php b/modules/cms/classes/Controller.php
index 5c6fdbdc0..8d9e9a9d7 100644
--- a/modules/cms/classes/Controller.php
+++ b/modules/cms/classes/Controller.php
@@ -723,6 +723,13 @@ class Controller
             }
         }
 
+        /*
+         * Generic handler that does nothing
+         */
+        if ($handler == 'onAjax') {
+            return true;
+        }
+
         return false;
     }