diff --git a/htdocs/commande/class/commande.class.php b/htdocs/commande/class/commande.class.php
index 5023410cf53..de3a47d36d4 100644
--- a/htdocs/commande/class/commande.class.php
+++ b/htdocs/commande/class/commande.class.php
@@ -4034,7 +4034,7 @@ class OrderLine extends CommonOrderLine
         $sql.= " ".(! empty($this->date_start)?"'".$this->db->idate($this->date_start)."'":"null").',';
         $sql.= " ".(! empty($this->date_end)?"'".$this->db->idate($this->date_end)."'":"null").',';
 	    $sql.= ' '.(!$this->fk_unit ? 'NULL' : $this->fk_unit);
-		$sql.= ", ".$this->fk_multicurrency;
+		$sql.= ", ".(! empty($this->fk_multicurrency) ? $this->fk_multicurrency : 'NULL');
 		$sql.= ", '".$this->db->escape($this->multicurrency_code)."'";
 		$sql.= ", ".$this->multicurrency_subprice;
 		$sql.= ", ".$this->multicurrency_total_ht;