diff --git a/lib/defaults.php b/lib/defaults.php
index b6124244c4c..4481f74c9ab 100644
--- a/lib/defaults.php
+++ b/lib/defaults.php
@@ -91,7 +91,6 @@
        'sessioncookie'            => '',
        'sessioncookiepath'        => '/',
        'sessiontimeout'           =>  7200,
-       'showsiteparticipantslist' =>  0,
        'showblocksonmodpages'     =>  0,
        'sitemailcharset'          => '',
        'sitepolicy'               => '',