diff --git a/htdocs/public/eventorganization/attendee_subscription.php b/htdocs/public/eventorganization/attendee_subscription.php
index 9ce8c0470bd..28c3375a62f 100644
--- a/htdocs/public/eventorganization/attendee_subscription.php
+++ b/htdocs/public/eventorganization/attendee_subscription.php
@@ -331,7 +331,7 @@ if (empty($reshook) && $action == 'add') {
 			if (!$error) {
 				// Add line to draft invoice
 				$vattouse = get_default_tva($mysoc, $thirdparty, $productforinvoicerow->id);
-				$result = $facture->addline($label, 0, 1, $vattouse, 0, 0, $productforinvoicerow->id, 0, dol_now(), '', 0, 0, '', 'TTC', floatval($project->price_registration), 1);
+				$result = $facture->addline($label, floatval($project->price_registration), 1, $vattouse, 0, 0, $productforinvoicerow->id, 0, dol_now(), '', 0, 0, '', 'HT', 0, 1);
 				if ($result <= 0) {
 					$confattendee->error = $facture->error;
 					$confattendee->errors = $facture->errors;