diff --git a/htdocs/core/lib/payments.lib.php b/htdocs/core/lib/payments.lib.php
index 3a398e50f69..73f8e507caf 100644
--- a/htdocs/core/lib/payments.lib.php
+++ b/htdocs/core/lib/payments.lib.php
@@ -292,7 +292,7 @@ function htmlPrintOnlinePaymentFooter($fromcompany,$langs,$addformmessage=0,$suf
     	else if (! empty($conf->global->ONLINE_PAYMENT_MESSAGE_FORM)) print $langs->transnoentities($conf->global->ONLINE_PAYMENT_MESSAGE_FORM);
 
     	// Add other message if VAT exists
-    	if (! empty($object->total_vat) || ! empty($object->total_tva))
+    	if ($object->total_vat != 0 || $object->total_tva != 0)
     	{
     		$parammessageform='ONLINE_PAYMENT_MESSAGE_FORMIFVAT_'.$suffix;
     		if (! empty($conf->global->$parammessageform)) print $langs->transnoentities($conf->global->$parammessageform);