diff --git a/htdocs/commande/class/commande.class.php b/htdocs/commande/class/commande.class.php
index cc744f9eb56..0975bfbd7ef 100644
--- a/htdocs/commande/class/commande.class.php
+++ b/htdocs/commande/class/commande.class.php
@@ -3686,7 +3686,7 @@ class Commande extends CommonOrder
 				$label .= ' '.$this->getLibStatut(5);
 			}
 			$label .= '<br><b>'.$langs->trans('Ref').':</b> '.$this->ref;
-			$label .= '<br><b>'.$langs->trans('RefCustomer').':</b> '.($this->ref_customer ? $this->ref_customer : $this->ref_client);
+			$label .= '<br><b>'.$langs->trans('RefCustomer').':</b> '.(empty($this->ref_customer) ? (empty($this->ref_client) ? '' : $this-ref_client) : $this->ref_customer);
 			if (!empty($this->total_ht)) {
 				$label .= '<br><b>'.$langs->trans('AmountHT').':</b> '.price($this->total_ht, 0, $langs, 0, -1, -1, $conf->currency);
 			}