diff --git a/htdocs/core/modules/barcode/mod_barcode_product_standard.php b/htdocs/core/modules/barcode/mod_barcode_product_standard.php
index aeb7ea4cd8f..8db0d2001cd 100644
--- a/htdocs/core/modules/barcode/mod_barcode_product_standard.php
+++ b/htdocs/core/modules/barcode/mod_barcode_product_standard.php
@@ -130,7 +130,7 @@ class mod_barcode_product_standard extends ModeleNumRefBarCode
 	 * @param	string		$type       	type of barcode (EAN, ISBN, ...)
 	 * @return 	string      				Value if OK, '' if module not configured, <0 if KO
 	 */
-	function getNextValue($objproduct,$type='')
+	function getNextValue($objproduct=null,$type='')
 	{
 		global $db,$conf;
 
diff --git a/htdocs/core/modules/barcode/modules_barcode.class.php b/htdocs/core/modules/barcode/modules_barcode.class.php
index d03302f36b7..00f5fb967f7 100644
--- a/htdocs/core/modules/barcode/modules_barcode.class.php
+++ b/htdocs/core/modules/barcode/modules_barcode.class.php
@@ -91,7 +91,7 @@ abstract class ModeleNumRefBarCode
      *	@param	int			$type		Type
      *  @return string      			Value
      */
-    function getNextValue($objsoc=0,$type=-1)
+    function getNextValue($objsoc=null,$type=-1)
     {
         global $langs;
         return $langs->trans("Function_getNextValue_InModuleNotWorking");