diff --git a/htdocs/webservices/admin/index.php b/htdocs/webservices/admin/index.php
index 30a7c0fb7ce..f945b527a60 100644
--- a/htdocs/webservices/admin/index.php
+++ b/htdocs/webservices/admin/index.php
@@ -27,6 +27,7 @@
 // Load Dolibarr environment
 require '../../main.inc.php';
 require_once DOL_DOCUMENT_ROOT.'/core/lib/admin.lib.php';
+require_once DOL_DOCUMENT_ROOT.'/core/lib/security2.lib.php';
 
 $langs->load("admin");