diff --git a/src/Wallabag/CoreBundle/Entity/Config.php b/src/Wallabag/CoreBundle/Entity/Config.php
index 496fadb45..1204efa85 100644
--- a/src/Wallabag/CoreBundle/Entity/Config.php
+++ b/src/Wallabag/CoreBundle/Entity/Config.php
@@ -2,6 +2,7 @@
 
 namespace Wallabag\CoreBundle\Entity;
 
+use Doctrine\Common\Collections\ArrayCollection;
 use Doctrine\ORM\Mapping as ORM;
 use Symfony\Component\Validator\Constraints as Assert;