diff --git a/src/Parameters.php b/src/Parameters.php
index be72f3fd9..1446122ae 100644
--- a/src/Parameters.php
+++ b/src/Parameters.php
@@ -26,7 +26,7 @@ public function __construct(array $values = null)
         if (null === $values) {
             $values = array();
         }
-        parent::__construct($values, ArrayObject::ARRAY_AS_PROPS);
+        parent::__construct($values, PhpArrayObject::ARRAY_AS_PROPS);
     }
 
     /**