diff --git a/htdocs/commande/apercu.php b/htdocs/commande/apercu.php
index 977fc689d18..e005cfa951e 100644
--- a/htdocs/commande/apercu.php
+++ b/htdocs/commande/apercu.php
@@ -46,6 +46,7 @@ $langs->load('sendings');
 
 
 require_once(DOL_DOCUMENT_ROOT.'/commande/commande.class.php');
+require_once(DOL_DOCUMENT_ROOT.'/propal.class.php');
 
 if ($conf->projet->enabled) 
 {