diff --git a/htdocs/product/price.php b/htdocs/product/price.php
index dd56aa42318..61b2be4f837 100644
--- a/htdocs/product/price.php
+++ b/htdocs/product/price.php
@@ -349,6 +349,7 @@ if (empty($reshook))
 
 				$newprice = price2num($newprice, 'MU');
 				$newprice_min = price2num($val['price_min'], 'MU');
+				$newvattx = price2num($val['vat_tx']);
 
 				if (!empty($conf->global->PRODUCT_MINIMUM_RECOMMENDED_PRICE) && $newprice_min < $maxpricesupplier) {
 					setEventMessages($langs->trans("MinimumPriceLimit", price($maxpricesupplier, 0, '', 1, - 1, - 1, 'auto')), null, 'errors');
@@ -356,11 +357,10 @@ if (empty($reshook))
 					break;
 				}
 
-				if ($object->multiprices[$key] != $newprice || $object->multiprices_min[$key] != $newprice_min || $object->multiprices_base_type[$key] != $val['price_base_type'])
+				if ($object->multiprices[$key] != $newprice || $object->multiprices_min[$key] != $newprice_min || $object->multiprices_base_type[$key] != $val['price_base_type'] || $object->multiprices_tva_tx[$key] != $newvattx)
        				$res = $object->updatePrice($newprice, $val['price_base_type'], $user, $val['vat_tx'], $newprice_min, $key, $val['npr'], $psq, 0, $val['localtaxes_array'], $val['default_vat_code']);
 				else $res = 0;
 
-
 				if ($res < 0) {
 					$error++;
 					setEventMessages($object->error, $object->errors, 'errors');