diff --git a/htdocs/includes/barcode/php-barcode/php-barcode.php b/htdocs/includes/barcode/php-barcode/php-barcode.php
index 0ef2e6d6fcb..89385045629 100644
--- a/htdocs/includes/barcode/php-barcode/php-barcode.php
+++ b/htdocs/includes/barcode/php-barcode/php-barcode.php
@@ -78,7 +78,7 @@ if (isset($_SERVER['WINDIR']) && @file_exists($_SERVER['WINDIR'])){
  * genbarcode is needed to render encodings other than EAN-12/EAN-13/ISBN
  */
 // DOL_CHANGE LDR
-if (isset($_SERVER['WINDIR']) && @file_exists($_SERVER['WINDIR']))
+if (isset($_SERVER['WINDIR']) && empty($conf->global->GENBARCODE_LOCATION))
 {
 	$genbarcode_loc = DOL_DOCUMENT_ROOT.'/includes/barcode/php-barcode/genbarcode/genbarcode.exe';
 }
diff --git a/htdocs/includes/modules/modBarcode.class.php b/htdocs/includes/modules/modBarcode.class.php
index 9e7e8adfe32..21518b041b4 100644
--- a/htdocs/includes/modules/modBarcode.class.php
+++ b/htdocs/includes/modules/modBarcode.class.php
@@ -68,8 +68,10 @@ class modBarcode extends DolibarrModules
 		// Config pages
 		$this->config_page_url = array("barcode.php");
 
-		// Constantes
-		$this->const = array();
+		// Constants
+		// Example: $this->const=array(0=>array('MYMODULE_MYNEWCONST1','chaine','myvalue','This is a constant to add',0),
+		//                            1=>array('MYMODULE_MYNEWCONST2','chaine','myvalue','This is another constant to add',0) );
+		$this->const = array(0=>array('GENBARCODE_LOCATION','chaine',DOL_DOCUMENT_ROOT.'/includes/barcode/php-barcode/genbarcode/genbarcode','Path to genbarcode command line tool',0));
 
 		// Boxes
 		$this->boxes = array();
diff --git a/htdocs/install/mysql/data/llx_const.sql b/htdocs/install/mysql/data/llx_const.sql
index 2099742b049..686eec6fb74 100644
--- a/htdocs/install/mysql/data/llx_const.sql
+++ b/htdocs/install/mysql/data/llx_const.sql
@@ -179,12 +179,6 @@ insert into llx_const (name, value, type, note, visible) values ('FACTURE_ADDON_
 insert into llx_const (name, value, type, note, visible) VALUES ('PROPALE_VALIDITY_DURATION',      '15', 'chaine', 'Durée de validitée des propales',0);
 
 
---
--- Barcode
---
-insert into llx_const (name, value, type, note, visible, entity) values ('GENBARCODE_LOCATION','/usr/local/bin/genbarcode','chaine','location of genbarcode',0,0);
-
-
 --
 -- Action sur agenda
 --