diff --git a/apps/user_ldap/lib/Group_Proxy.php b/apps/user_ldap/lib/Group_Proxy.php
index 73daf4fdd77..7410aa6a6e9 100644
--- a/apps/user_ldap/lib/Group_Proxy.php
+++ b/apps/user_ldap/lib/Group_Proxy.php
@@ -178,7 +178,7 @@ class Group_Proxy extends Proxy implements \OCP\GroupInterface, IGroupLDAP, IGet
 			}
 		}
 
-		return $groups;
+		return array_values(array_unique($groups));
 	}
 
 	/**