diff --git a/htdocs/cashdesk/include/environnement.php b/htdocs/cashdesk/include/environnement.php
index b4912dc03eb..2e2946e9fca 100644
--- a/htdocs/cashdesk/include/environnement.php
+++ b/htdocs/cashdesk/include/environnement.php
@@ -1,7 +1,7 @@
 <?php
-/* Copyright (C) 2007-2008 Jeremie Ollivier <jeremie.o@laposte.net>
- * Copyright (C) 2009-2010 Laurent Destailleur  <eldy@users.sourceforge.net>
- * Copyright (C) 2011 Juanjo Menent 			<jmenent@2byte.es>
+/* Copyright (C) 2007-2008 Jeremie Ollivier     <jeremie.o@laposte.net>
+ * Copyright (C) 2009-2011 Laurent Destailleur  <eldy@users.sourceforge.net>
+ * Copyright (C) 2011      Juanjo Menent 		<jmenent@2byte.es>
  *
  * 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
@@ -42,12 +42,11 @@ $conf_fkaccount_cb = (! empty($_SESSION["CASHDESK_ID_BANKACCOUNT_CB"]))?$_SESSIO
 //var_dump($_SESSION);
 
 
-// Parametres d'affichage
+// View parameters
 $conf_taille_listes = (empty($conf->global->PRODUIT_LIMIT_SIZE)?500:$conf->global->PRODUIT_LIMIT_SIZE);	// Nombre max de lignes a afficher dans les listes
 $conf_nbr_car_listes = 60;	// Nombre max de caracteres par ligne dans les listes
 
-// Aurélien Imhof: Force decremente stock sur validation facture, quelque soit mode configuré
-if(!isset($conf->global->STOCK_CALCULATE_ON_BILL))
-$conf->global->STOCK_CALCULATE_ON_BILL = 1 ; 
+// Add hidden option to force decrease of stock whatever is user setup
+if (! empty($conf->global->CASHDESK_FORCE_STOCK_ON_BILL)) $conf->global->STOCK_CALCULATE_ON_BILL=1;
 
 ?>