diff --git a/htdocs/admin/system/security.php b/htdocs/admin/system/security.php
index 7336dde9c3c..fc083f02c8a 100644
--- a/htdocs/admin/system/security.php
+++ b/htdocs/admin/system/security.php
@@ -44,6 +44,7 @@ require '../../main.inc.php';
  * @var string		$dolibarr_nocsrfcheck
  * @var string|string[]		$dolibarr_main_stream_to_disable
  */
+require_once DOL_DOCUMENT_ROOT.'/core/lib/admin.lib.php';
 require_once DOL_DOCUMENT_ROOT.'/core/lib/memory.lib.php';
 require_once DOL_DOCUMENT_ROOT.'/core/lib/date.lib.php';
 require_once DOL_DOCUMENT_ROOT.'/core/lib/files.lib.php';