diff --git a/assets/plugins/simplefiles/ajax.php b/assets/plugins/simplefiles/ajax.php
index f08d8b1..4253268 100644
--- a/assets/plugins/simplefiles/ajax.php
+++ b/assets/plugins/simplefiles/ajax.php
@@ -1,5 +1,7 @@
 <?php
 define('MODX_API_MODE', true);
+define('IN_MANAGER_MODE', true);
+
 include_once(__DIR__."/../../../index.php");
 $modx->db->connect();
 if (empty ($modx->config)) {