diff --git a/settings/ajax/createuser.php b/settings/ajax/createuser.php
index 4f0424754a..ae1d8856f4 100644
--- a/settings/ajax/createuser.php
+++ b/settings/ajax/createuser.php
@@ -1,7 +1,7 @@
 <?php
 
 OCP\JSON::callCheck();
-OCP\JSON::checkSubAdminUser();
+OC_JSON::checkSubAdminUser();
 
 if(OC_User::isAdminUser(OC_User::getUser())) {
 	$groups = array();