diff --git a/htdocs/commande/class/commande.class.php b/htdocs/commande/class/commande.class.php
index 64ea2132ea1..f43e78a1d76 100644
--- a/htdocs/commande/class/commande.class.php
+++ b/htdocs/commande/class/commande.class.php
@@ -29,6 +29,7 @@
 include_once(DOL_DOCUMENT_ROOT."/core/class/commonorder.class.php");
 require_once(DOL_DOCUMENT_ROOT."/product/class/product.class.php");
 
+require_once(DOL_DOCUMENT_ROOT ."/marges/lib/marges.lib.php");
 
 /**
  *  \class      Commande