diff --git a/core/trunk/core/class/class_security.php b/core/trunk/core/class/class_security.php
index 21ce8b9befcb502c8b9a69b8555aacebb21813bb..7bd62faa329afe71f993605eaee42769129dc554 100644
--- a/core/trunk/core/class/class_security.php
+++ b/core/trunk/core/class/class_security.php
@@ -44,6 +44,7 @@
 require_once 'core/class/class_db_pdo.php';
 require_once 'core/class/class_history.php';
 require_once 'core/class/SecurityControler.php';
+require_once 'core/class/class_core_tools.php';
 require_once 'core/where_targets.php';
 require_once 'core/class/users_controler.php';
 if (isset($_SESSION['config'])) {