diff --git a/admin/index.php b/admin/index.php
index e42687a625b..92ebceb5ad8 100644
--- a/admin/index.php
+++ b/admin/index.php
@@ -505,6 +505,11 @@ if (!$cache) {
 
 // Check for valid admin user - no guest autologin
 require_login(0, false);
+if (isguestuser()) {
+    // Login as real user!
+    $SESSION->wantsurl = (string)new moodle_url('/admin/index.php');
+    redirect(get_login_url());
+}
 $context = context_system::instance();
 require_capability('moodle/site:config', $context);