diff --git a/htdocs/includes/modules/barcode/phpbarcode.modules.php b/htdocs/includes/modules/barcode/phpbarcode.modules.php
index 881e7c181c2..9cb3c8772f8 100644
--- a/htdocs/includes/modules/barcode/phpbarcode.modules.php
+++ b/htdocs/includes/modules/barcode/phpbarcode.modules.php
@@ -68,6 +68,7 @@ class modPhpbarcode extends ModeleBarCode
 		$supported=0;
 		if ($encoding == 'EAN8')  $supported=1;
 		if ($encoding == 'EAN13') $supported=1;
+		if ($encoding == 'UPC')   $supported=1;
 		if ($encoding == 'ISBN')  $supported=1;
 		if ($encoding == 'C39')   $supported=1;
 		if ($encoding == 'C128')  $supported=1;
diff --git a/htdocs/viewimage.php b/htdocs/viewimage.php
index 3dcbcaf35e3..e6e417eb64c 100644
--- a/htdocs/viewimage.php
+++ b/htdocs/viewimage.php
@@ -1,6 +1,7 @@
 <?php
 /* Copyright (C) 2004-2005 Rodolphe Quiedeville <rodolphe@quiedeville.org>
  * Copyright (C) 2005-2008 Laurent Destailleur  <eldy@users.sourceforge.net>
+ * Copyright (C) 2005-2008 Regis Houssin        <regis@dolibarr.fr>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -306,7 +307,7 @@ if ($modulepart == 'barcode')
 	$generator=$_GET["generator"];
 	$code=$_GET["code"];
 	$encoding=$_GET["encoding"];
-	$readable=$_GET["readable"];
+	$readable=$_GET["readable"]?$_GET["readable"]:"Y";
 
 	// Chargement de la classe de codage
 	require_once($dir.$generator.".modules.php");