diff --git a/core/trunk/core/class/class_security.php b/core/trunk/core/class/class_security.php
index 7bd62faa329afe71f993605eaee42769129dc554..2b9bfb2d93b786c464533b3899060a993ea80524 100644
--- a/core/trunk/core/class/class_security.php
+++ b/core/trunk/core/class/class_security.php
@@ -47,7 +47,7 @@ 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($_SESSION['config'])) {
+if (isset($_SESSION['config']['app_id'])) {
     require_once 'apps/' . $_SESSION['config']['app_id']
         . '/class/class_business_app_tools.php';
 }