diff --git a/src/Controller/Controller.php b/src/Controller/Controller.php
index 6d3705b3989..cd4bf8167c6 100644
--- a/src/Controller/Controller.php
+++ b/src/Controller/Controller.php
@@ -430,6 +430,7 @@ public function invokeAction()
                 'plugin' => $request->getParam('plugin'),
             ]);
         }
+        /* @var callable $callable */
         $callable = [$this, $request->getParam('action')];
 
         return $callable(...$request->getParam('pass'));