diff --git a/htdocs/commande/liste.php b/htdocs/commande/liste.php
index 115f0ab01b8..66a4d2fc080 100644
--- a/htdocs/commande/liste.php
+++ b/htdocs/commande/liste.php
@@ -29,6 +29,7 @@
 
 require("../main.inc.php");
 require_once(DOL_DOCUMENT_ROOT."/html.formfile.class.php");
+require_once(DOL_DOCUMENT_ROOT ."/commande/commande.class.php");
 
 $langs->load('orders');
 $langs->load('companies');