diff --git a/lib/Doctrine/ORM/AbstractQuery.php b/lib/Doctrine/ORM/AbstractQuery.php
index f51924ca1..e1667add2 100644
--- a/lib/Doctrine/ORM/AbstractQuery.php
+++ b/lib/Doctrine/ORM/AbstractQuery.php
@@ -320,7 +320,7 @@ abstract class AbstractQuery
      *
      * @param mixed $key The key (index or name) of the bound parameter.
      *
-     * @return mixed The value of the bound parameter.
+     * @return Query\Parameter|null The value of the bound parameter, or NULL if not available.
      */
     public function getParameter($key)
     {