diff --git a/includes/session.inc b/includes/session.inc
index 9f671b3..8ea5659 100644
--- a/includes/session.inc
+++ b/includes/session.inc
@@ -135,6 +135,13 @@ function sess_regenerate() {
     setcookie(session_name(), '', time() - 42000, '/');
   }
 
+  if (version_compare(PHP_VERSION, '5.2.0') >= 0) {
+    extract(session_get_cookie_params());
+    // Set "httponly" to TRUE to reduce the risk of session stealing via XSS.
+    // This has no effect for PHP < 5.2.0.
+    session_set_cookie_params($lifetime, $path, $domain, $secure, TRUE);
+  }
+
   session_regenerate_id();
 
   db_query("UPDATE {sessions} SET sid = '%s' WHERE sid = '%s'", session_id(), $old_session_id);