diff --git a/htdocs/admin/websites.php b/htdocs/admin/websites.php
index 7704e7f3198..0a7737041b7 100644
--- a/htdocs/admin/websites.php
+++ b/htdocs/admin/websites.php
@@ -27,6 +27,7 @@ require_once DOL_DOCUMENT_ROOT.'/core/class/html.formcompany.class.php';
 require_once DOL_DOCUMENT_ROOT.'/core/lib/admin.lib.php';
 require_once DOL_DOCUMENT_ROOT.'/core/lib/functions2.lib.php';
 require_once DOL_DOCUMENT_ROOT.'/core/class/doleditor.class.php';
+require_once DOL_DOCUMENT_ROOT.'/accountancy/class/html.formventilation.class.php';
 
 $langs->load("errors");
 $langs->load("admin");