diff --git a/htdocs/compta/facture/class/facture.class.php b/htdocs/compta/facture/class/facture.class.php
index ae368b3870b..333f71806c6 100644
--- a/htdocs/compta/facture/class/facture.class.php
+++ b/htdocs/compta/facture/class/facture.class.php
@@ -2392,7 +2392,7 @@ class Facture extends CommonInvoice
 			$this->line->date_start			= $date_start;
 			$this->line->date_end			= $date_end;
 			$this->line->total_ht			= (($this->type==self::TYPE_CREDIT_NOTE||$qty<0)?-abs($total_ht):$total_ht);  // For credit note and if qty is negative, total is negative
-			$this->line->total_tva			= $total_tva;
+			$this->line->total_tva			= (($this->type==self::TYPE_CREDIT_NOTE||$qty<0)?-abs($total_tva):$total_tva);
 			$this->line->total_localtax1	= $total_localtax1;
 			$this->line->total_localtax2	= $total_localtax2;
 			$this->line->total_ttc			= (($this->type==self::TYPE_CREDIT_NOTE||$qty<0)?-abs($total_ttc):$total_ttc);