diff --git a/phpgwapi/inc/class.categories.inc.php b/phpgwapi/inc/class.categories.inc.php
index c60d4e63fb..fcbed923b5 100644
--- a/phpgwapi/inc/class.categories.inc.php
+++ b/phpgwapi/inc/class.categories.inc.php
@@ -59,7 +59,9 @@
 			$this->app_name		= $app_name;
 			$this->db			= clone($GLOBALS['egw']->db);
 			$this->db->set_app('phpgwapi');
-			$this->grants		= $GLOBALS['egw']->acl->get_grants($app_name);
+			if($app_name != 'addressbook' && $GLOBALS['egw_info']['server']['account_repository'] != 'ldap') {
+			     $this->grants		= $GLOBALS['egw']->acl->get_grants($app_name);
+			}
 		}
 
 		/**