diff --git a/htdocs/product/price.php b/htdocs/product/price.php
index 1f62ff95aec..ad73b57d76f 100644
--- a/htdocs/product/price.php
+++ b/htdocs/product/price.php
@@ -1123,7 +1123,7 @@ if (! $action || $action == 'delete' || $action == 'showlog_customer_price' || $
 	  	}
 	}
 
-	if (! empty($conf->global->PRODUIT_MULTIPRICES) && empty($conf->global->PRODUIT_CUSTOMER_PRICES_BY_QTY_MULTIPRICES))
+	if (! empty($conf->global->PRODUIT_MULTIPRICES) || ! empty($conf->global->PRODUIT_CUSTOMER_PRICES_BY_QTY_MULTIPRICES))
 	{
 	    if ($user->rights->produit->creer || $user->rights->service->creer) {
     		print '<div class="inline-block divButAction"><a class="butAction" href="' . $_SERVER['PHP_SELF'] . '?action=edit_vat&amp;id=' . $object->id . '">' . $langs->trans("UpdateVAT") . '</a></div>';