diff --git a/app/controllers/wysiwyg.php b/app/controllers/wysiwyg.php
index cb07e6fcd063d383a0860e552d01acae10cd8f48..13a8aa1b64ac337d9fe394b651ff363b32c0825b 100644
--- a/app/controllers/wysiwyg.php
+++ b/app/controllers/wysiwyg.php
@@ -120,4 +120,13 @@ class WysiwygController extends AuthenticatedController
         }
         $this->render_json($response); // send HTTP response to client
     }
+
+    /**
+     * Display the WYSIWYG editor's help window.
+     */
+    public function a11yhelp_action()
+    {
+        // nothing to do
+        PageLayout::setTitle(_('Hilfe zur Bedienung des Editors'));
+    }
 }