diff --git a/js/config.php b/js/config.php
index 8f1caaef..838f4767 100644
--- a/js/config.php
+++ b/js/config.php
@@ -24,11 +24,13 @@ OCP\JSON::setContentTypeHeader('text/javascript');
 OCP\JSON::checkLoggedIn();
 OCP\JSON::checkAppEnabled('contacts');
 
-echo 'var contacts_groups_sortorder=[' . OCP\Config::getUserValue(OCP\USER::getUser(), 'contacts', 'groupsort', '') . '],';
+$user = OCP\User::getUser();
+
+echo 'var contacts_groups_sortorder=[' . OCP\Config::getUserValue($user, 'contacts', 'groupsort', '') . '],';
 echo 'contacts_properties_indexed = '
-	. (OCP\Config::getUserValue(OCP\USER::getUser(), 'contacts', 'contacts_properties_indexed', 'no') === 'no'
+	. (OCP\Config::getUserValue($user, 'contacts', 'contacts_properties_indexed', 'no') === 'no'
 	? 'false' : 'true') . ',';
 echo 'contacts_categories_indexed = '
-	. (OCP\Config::getUserValue(OCP\USER::getUser(), 'contacts', 'contacts_categories_indexed', 'no') === 'no'
+	. (OCP\Config::getUserValue($user, 'contacts', 'contacts_categories_indexed', 'no') === 'no'
 	? 'false' : 'true') . ',';
-echo 'lang=\'' . OCP\Config::getUserValue(OCP\USER::getUser(), 'core', 'lang', 'en') . '\';';
+echo 'lang=\'' . OCP\Config::getUserValue($user, 'core', 'lang', 'en') . '\';';