diff --git a/htdocs/core/class/html.formticket.class.php b/htdocs/core/class/html.formticket.class.php
index 0f00bbf770d..f2a185e534d 100644
--- a/htdocs/core/class/html.formticket.class.php
+++ b/htdocs/core/class/html.formticket.class.php
@@ -334,7 +334,7 @@ class FormTicket
 		print '</td></tr>';
 
 		// Severity => Priority
-		print '<tr><td><span class="none"><label for="selectseverity_code">'.$langs->trans("TicketSeverity").'</span></label></td><td>';
+		print '<tr><td><span class="fieldrequired"><label for="selectseverity_code">'.$langs->trans("TicketSeverity").'</span></label></td><td>';
 		$this->selectSeveritiesTickets((GETPOST('severity_code') ? GETPOST('severity_code') : $this->severity_code), 'severity_code', '', 2, 1);
 		print '</td></tr>';