diff --git a/redirect.module b/redirect.module
index c3c6329..bf9d843 100644
--- a/redirect.module
+++ b/redirect.module
@@ -1168,6 +1168,7 @@ function redirect_can_redirect() {
     elseif (variable_get('maintenance_mode', 0) || defined('MAINTENANCE_MODE')) {
       // Do not redirect in offline or maintenance mode.
       $can_redirect = FALSE;
+      drupal_set_message(t('Redirect does not work in maintenance mode'));
     }
     elseif (!variable_get('redirect_global_admin_paths', 0) && path_is_admin($path)) {
       // Do not redirect on admin paths.