diff --git a/lib/Doctrine/ORM/Query/Filter/SQLFilter.php b/lib/Doctrine/ORM/Query/Filter/SQLFilter.php
index 3c6daaaad..507493a54 100644
--- a/lib/Doctrine/ORM/Query/Filter/SQLFilter.php
+++ b/lib/Doctrine/ORM/Query/Filter/SQLFilter.php
@@ -56,6 +56,7 @@ abstract class SQLFilter
     final public function __construct(EntityManagerInterface $em)
     {
         $this->em = $em;
+        $this->parameters = array();
     }
 
     /**