diff --git a/application/application.inc.php b/application/application.inc.php
index cd856e7bb..f3b0155cc 100644
--- a/application/application.inc.php
+++ b/application/application.inc.php
@@ -31,6 +31,7 @@ require_once(APPROOT.'/application/sqlblock.class.inc.php');
 require_once(APPROOT.'/application/audit.category.class.inc.php');
 require_once(APPROOT.'/application/audit.rule.class.inc.php');
 require_once(APPROOT.'/application/query.class.inc.php');
+require_once(APPROOT.'/setup/moduleinstallation.class.inc.php');
 //require_once(APPROOT.'/application/menunode.class.inc.php');
 require_once(APPROOT.'/application/utils.inc.php');