diff --git a/htdocs/product/class/product.class.php b/htdocs/product/class/product.class.php
index 1a1799a435d..e17e8bbea7b 100644
--- a/htdocs/product/class/product.class.php
+++ b/htdocs/product/class/product.class.php
@@ -922,6 +922,7 @@ class Product extends CommonObject
 		$this->accountancy_code_sell_export = trim($this->accountancy_code_sell_export);
 
 
+
 		$this->db->begin();
 
 		$result = 0;
@@ -945,6 +946,7 @@ class Product extends CommonObject
 			if ($this->hasbatch() && !$this->oldcopy->hasbatch()) {
 				//$valueforundefinedlot = 'Undefined';  // In previous version, 39 and lower
 				$valueforundefinedlot = '000000';
+				if (!empty($conf->global->STOCK_DEFAULT_BATCH)) $valueforundefinedlot = $conf->global->STOCK_DEFAULT_BATCH;
 
 				dol_syslog("Flag batch of product id=".$this->id." is set to ON, so we will create missing records into product_batch");