diff --git a/src/Controller/AbstractRestfulController.php b/src/Controller/AbstractRestfulController.php
index cff21f6db..edc8e0b21 100644
--- a/src/Controller/AbstractRestfulController.php
+++ b/src/Controller/AbstractRestfulController.php
@@ -527,7 +527,7 @@ public function requestHasContentType(Request $request, $contentType = '')
      * @param  Callable $handler
      * @return AbstractRestfulController
      */
-    public function addHttpMethodHandler($method, /* Callable */ $handler)
+    public function addHttpMethodHandler($method, callable $handler)
     {
         if (! is_callable($handler)) {
             throw new Exception\InvalidArgumentException(sprintf(