diff --git a/src/Chamilo/UserBundle/Entity/User.php b/src/Chamilo/UserBundle/Entity/User.php
index 247bbf54c3..11b26fdc02 100644
--- a/src/Chamilo/UserBundle/Entity/User.php
+++ b/src/Chamilo/UserBundle/Entity/User.php
@@ -14,6 +14,7 @@ use Doctrine\ORM\Event\LifecycleEventArgs;
 use Doctrine\ORM\Mapping as ORM;
 use FOS\UserBundle\Model\GroupInterface;
 use FOS\UserBundle\Model\UserInterface;
+use ReflectionClass;
 use Symfony\Bridge\Doctrine\Validator\Constraints\UniqueEntity;
 use Symfony\Component\HttpFoundation\File\File;
 use Symfony\Component\Validator\Constraints as Assert;