diff --git a/Listener/WikiListener.php b/Listener/WikiListener.php
index 8fdfa01..d3b9fcf 100755
--- a/Listener/WikiListener.php
+++ b/Listener/WikiListener.php
@@ -72,7 +72,7 @@ public function onOpen(OpenResourceEvent $event)
 
     public function onDelete(DeleteResourceEvent $event)
     {
-        $em = $this->container->get('doctrine.orm.entity_manager');
+        $em = $this->container->get('claroline.persistence.object_manager');
         $em->remove($event->getResource());
         $em->flush();
         $event->stopPropagation(); 
@@ -88,4 +88,4 @@ public function onCopy(CopyResourceEvent $event)
         $event->setCopy($newWiki);
         $event->stopPropagation(); 
     }
-}
\ No newline at end of file
+}