diff --git a/src/Chamilo/CoreBundle/Entity/UsergroupRelUser.php b/src/Chamilo/CoreBundle/Entity/UsergroupRelUser.php
index 3659849548f..4ab8ff6fc7e 100644
--- a/src/Chamilo/CoreBundle/Entity/UsergroupRelUser.php
+++ b/src/Chamilo/CoreBundle/Entity/UsergroupRelUser.php
@@ -18,7 +18,11 @@
  * Class UsergroupRelUser
  *
  * @ORM\Table(
- *      name="usergroup_rel_user"
+ *     name="usergroup_rel_user",
+ *     indexes={
+ *          @ORM\Index(name="IDX_739515A9A76ED395", columns={"user_id"}),
+ *          @ORM\Index(name="IDX_739515A9D2112630", columns={"usergroup_id"})
+ *     }
  * )
  * @ORM\Entity
  */