diff --git a/app/Controller/Component/RestResponseComponent.php b/app/Controller/Component/RestResponseComponent.php
index 312555ac4..d85b221a2 100644
--- a/app/Controller/Component/RestResponseComponent.php
+++ b/app/Controller/Component/RestResponseComponent.php
@@ -279,7 +279,7 @@ class RestResponseComponent extends Component
 
     private $__scopedFieldsConstraint = array();
 
-    public function initialize($controller) {
+    public function initialize(Controller $controller) {
         $this->__configureFieldConstraints();
     }