diff --git a/admin/category.php b/admin/category.php
index 39b74abea80..9bfa2bbab66 100644
--- a/admin/category.php
+++ b/admin/category.php
@@ -30,7 +30,7 @@ $category = required_param('category', PARAM_SAFEDIR);
 $return = optional_param('return','', PARAM_ALPHA);
 $adminediting = optional_param('adminedit', -1, PARAM_BOOL);
 
-require_admin();
+require_login(0, false);
 $PAGE->set_context(context_system::instance());
 $PAGE->set_url('/admin/category.php', array('category' => $category));
 $PAGE->set_pagetype('admin-setting-' . $category);