diff --git a/htdocs/ticket/messaging.php b/htdocs/ticket/messaging.php
index 527b28c8fac..c3e70def7da 100644
--- a/htdocs/ticket/messaging.php
+++ b/htdocs/ticket/messaging.php
@@ -91,7 +91,7 @@ if ($user->socid > 0 && ($object->fk_soc != $user->socid)) {
 	accessforbidden();
 }
 // or for unauthorized internals users
-if (!$user->socid && ($conf->global->TICKET_LIMIT_VIEW_ASSIGNED_ONLY && $object->fk_user_assign != $user->id) && !$user->rights->ticket->manage) {
+if (!$user->socid && (!empty($conf->global->TICKET_LIMIT_VIEW_ASSIGNED_ONLY) && $object->fk_user_assign != $user->id) && !$user->rights->ticket->manage) {
 	accessforbidden();
 }
 
@@ -146,7 +146,7 @@ if ($socid > 0) {
 	print dol_get_fiche_end();
 }
 
-if (!$user->socid && $conf->global->TICKET_LIMIT_VIEW_ASSIGNED_ONLY) {
+if (!$user->socid && !empty($conf->global->TICKET_LIMIT_VIEW_ASSIGNED_ONLY)) {
 	$object->next_prev_filter = "te.fk_user_assign = '".$user->id."'";
 } elseif ($user->socid > 0) {
 	$object->next_prev_filter = "te.fk_soc = '".$user->socid."'";