diff --git a/htdocs/compta/facture.php b/htdocs/compta/facture.php
index 3ee875b5d93..2bf69038e78 100644
--- a/htdocs/compta/facture.php
+++ b/htdocs/compta/facture.php
@@ -1433,7 +1433,7 @@ if (empty($reshook))
 								$pu_ht = price($prodcustprice->lines[0]->price);
 								$pu_ttc = price($prodcustprice->lines[0]->price_ttc);
 								$price_base_type = $prodcustprice->lines[0]->price_base_type;
-								$prod->tva_tx = $prodcustprice->lines[0]->tva_tx;
+								$tva_tx = $prodcustprice->lines[0]->tva_tx;
 							}
 						}
 					}