diff --git a/src/Wallabag/CoreBundle/Twig/WallabagExtension.php b/src/Wallabag/CoreBundle/Twig/WallabagExtension.php
index c116248ff..6e46c7018 100644
--- a/src/Wallabag/CoreBundle/Twig/WallabagExtension.php
+++ b/src/Wallabag/CoreBundle/Twig/WallabagExtension.php
@@ -5,7 +5,7 @@ namespace Wallabag\CoreBundle\Twig;
 use Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface;
 use Wallabag\CoreBundle\Repository\EntryRepository;
 
-class WallabagExtension extends \Twig_Extension
+class WallabagExtension extends \Twig_Extension implements \Twig_Extension_GlobalsInterface
 {
     private $tokenStorage;
     private $repository;