diff --git a/htdocs/product/card.php b/htdocs/product/card.php
index 0a493ef60bc..b4a3f8ab420 100644
--- a/htdocs/product/card.php
+++ b/htdocs/product/card.php
@@ -636,7 +636,7 @@ 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;
                     }
                 }
             }