diff --git a/htdocs/product/class/product.class.php b/htdocs/product/class/product.class.php
index c3b337c4a16..fa241367462 100644
--- a/htdocs/product/class/product.class.php
+++ b/htdocs/product/class/product.class.php
@@ -1351,6 +1351,7 @@ class Product extends CommonObject
 		$sql.= " weight, weight_units, length, length_units, surface, surface_units, volume, volume_units, barcode, fk_barcode_type, finished,";
 		$sql.= " accountancy_code_buy, accountancy_code_sell, stock, pmp,";
 		$sql.= " datec, tms, import_key, entity, desiredstock, tobatch";
+		$sql.= " ,ref_ext";
 		$sql.= " FROM ".MAIN_DB_PREFIX."product";
 		if ($id) $sql.= " WHERE rowid = ".$this->db->escape($id);
 		else
@@ -1424,6 +1425,8 @@ class Product extends CommonObject
 				$this->date_modification		= $obj->tms;
 				$this->import_key				= $obj->import_key;
 				$this->entity					= $obj->entity;
+				
+				$this->ref_ext					= $obj->ref_ext;
 
 				$this->db->free($resql);