diff --git a/htdocs/fourn/commande/pre.inc.php b/htdocs/fourn/commande/pre.inc.php
index 5d4eb3b8271..1d6a7152fdd 100644
--- a/htdocs/fourn/commande/pre.inc.php
+++ b/htdocs/fourn/commande/pre.inc.php
@@ -33,6 +33,7 @@ $langs->load("suppliers");
 $langs->load("companies");
 $user->getrights('fournisseur');
 
+require_once DOL_DOCUMENT_ROOT."/fournisseur.class.php";
 require_once DOL_DOCUMENT_ROOT."/fournisseur.commande.class.php";
 
 function llxHeader($head = "", $title = "")