diff --git a/admin/settings/security.php b/admin/settings/security.php
index 4d9055bb369..bdac58e0a73 100644
--- a/admin/settings/security.php
+++ b/admin/settings/security.php
@@ -26,7 +26,7 @@ if ($hassiteconfig) { // speedup for non-admins, add all caps used on this page
                        2700 => get_string('numminutes', '', 45),
                        3600 => get_string('numminutes', '', 60))));
     $temp->add(new admin_setting_configselect('fullnamedisplay', get_string('fullnamedisplay', 'admin'), get_string('configfullnamedisplay', 'admin'),
-                  'firstname lastname', array('language' => get_string('language'),
+                  'language', array('language' => get_string('language'),
                                               'firstname lastname' => get_string('firstname').' + '.get_string('lastname'),
                                               'lastname firstname' => get_string('lastname').' + '.get_string('firstname'),
                                               'firstname' => get_string('firstname'))));