diff --git a/htdocs/fourn/class/fournisseur.facture.class.php b/htdocs/fourn/class/fournisseur.facture.class.php
index 42418184c4f..a4799bc53fe 100644
--- a/htdocs/fourn/class/fournisseur.facture.class.php
+++ b/htdocs/fourn/class/fournisseur.facture.class.php
@@ -7,7 +7,7 @@
  * Copyright (C) 2010-2015	Juanjo Menent			<jmenent@2byte.es>
  * Copyright (C) 2013		Philippe Grand			<philippe.grand@atoo-net.com>
  * Copyright (C) 2013       Florian Henry		  	<florian.henry@open-concept.pro>
- * Copyright (C) 2014-2015  Marcos García           <marcosgdf@gmail.com>
+ * Copyright (C) 2014-2016  Marcos García           <marcosgdf@gmail.com>
  * Copyright (C) 2015       Bahfir Abbes            <bafbes@gmail.com>
  *
  * This program is free software; you can redistribute it and/or modify
@@ -646,7 +646,16 @@ class FactureFournisseur extends CommonInvoice
 
         dol_syslog(get_class($this)."::update", LOG_DEBUG);
         $resql = $this->db->query($sql);
-        if (! $resql) { $error++; $this->errors[]="Error ".$this->db->lasterror(); }
+
+        if (!$resql) {
+            $error++;
+
+            if ($this->db->errno() == 'DB_ERROR_RECORD_ALREADY_EXISTS') {
+                $this->errors[] = $langs->trans('ErrorRefAlreadyExists');
+            } else {
+                $this->errors[] = "Error ".$this->db->lasterror();
+            }
+        }
 
         if (! $error)
         {
diff --git a/htdocs/fourn/facture/card.php b/htdocs/fourn/facture/card.php
index 24506fb31a8..f1de6a68a78 100644
--- a/htdocs/fourn/facture/card.php
+++ b/htdocs/fourn/facture/card.php
@@ -238,8 +238,11 @@ if (empty($reshook))
 	// Set supplier ref
 	if ($action == 'setref_supplier' && $user->rights->fournisseur->commande->creer)
 	{
-	    $result=$object->setValueFrom('ref_supplier',GETPOST('ref_supplier','alpha'));
-	    if ($result < 0) dol_print_error($db, $object->error);
+		$object->ref_supplier = GETPOST('ref_supplier', 'alpha');
+		
+		if ($object->update() < 0) {
+			setEventMessages($object->error, $object->errors, 'errors');
+		}
 	}
 
 	// conditions de reglement