diff --git a/htdocs/core/lib/functions.lib.php b/htdocs/core/lib/functions.lib.php
index 0b8861d2cea..04e1b9a0554 100644
--- a/htdocs/core/lib/functions.lib.php
+++ b/htdocs/core/lib/functions.lib.php
@@ -14696,9 +14696,9 @@ function show_actions_messaging($conf, $langs, $db, $filterobj, $objcon = null,
 			}
 
 			$libelle = '';
-			if (preg_match('/^TICKET_MSG/', $actionstatic->code)) {
+			if (!empty($actionstatic->code) && preg_match('/^TICKET_MSG/', $actionstatic->code)) {
 				$out .= $langs->trans('TicketNewMessage');
-			} elseif (preg_match('/^TICKET_MSG_PRIVATE/', $actionstatic->code)) {
+			} elseif (!empty($actionstatic->code) && preg_match('/^TICKET_MSG_PRIVATE/', $actionstatic->code)) {
 				$out .= $langs->trans('TicketNewMessage').' <em>('.$langs->trans('Private').')</em>';
 			} elseif (isset($histo[$key]['type'])) {
 				if ($histo[$key]['type'] == 'action') {