diff --git a/htdocs/compta/facture/class/facture.class.php b/htdocs/compta/facture/class/facture.class.php
index 52228b94839..d1384382c56 100644
--- a/htdocs/compta/facture/class/facture.class.php
+++ b/htdocs/compta/facture/class/facture.class.php
@@ -3517,8 +3517,8 @@ class FactureLigne  extends CommonInvoiceLine
 		$sql.= " ".price2num($this->tva_tx).",";
 		$sql.= " ".price2num($this->localtax1_tx).",";
 		$sql.= " ".price2num($this->localtax2_tx).",";
-		$sql.= " ".price2num($this->localtax1_type).",";
-		$sql.= " ".price2num($this->localtax2_type).",";
+		$sql.= " '".$this->localtax1_type."',";
+		$sql.= " '".$this->localtax2_type."',";
 		$sql.= ' '.(! empty($this->fk_product)?$this->fk_product:"null").',';
 		$sql.= " ".$this->product_type.",";
 		$sql.= " ".price2num($this->remise_percent).",";