diff --git a/phpBB/viewonline.php b/phpBB/viewonline.php
index 98f0fb47af..becd307bf7 100644
--- a/phpBB/viewonline.php
+++ b/phpBB/viewonline.php
@@ -339,6 +339,7 @@ $pagination = generate_pagination(append_sid("{$phpbb_root_path}viewonline.$phpE
 $sql = 'SELECT group_id, group_name, group_colour, group_type
 	FROM ' . GROUPS_TABLE . '
 	WHERE group_legend = 1
+		AND group_type <> ' . GROUP_HIDDEN . '
 	ORDER BY group_name ASC';
 $result = $db->sql_query($sql);