diff --git a/htdocs/commande/commande.class.php b/htdocs/commande/commande.class.php
index 96834f8141d..92883da2afe 100644
--- a/htdocs/commande/commande.class.php
+++ b/htdocs/commande/commande.class.php
@@ -30,6 +30,7 @@
 */
 
 require_once(DOL_DOCUMENT_ROOT."/product.class.php");
+require_once(DOL_DOCUMENT_ROOT ."/contact.class.php");
 
  
 /**