diff --git a/FAQ.md b/FAQ.md
index db11c46..91bc9f5 100644
--- a/FAQ.md
+++ b/FAQ.md
@@ -1739,7 +1739,7 @@ Build a custom client with [WebSocket allowed](https://rustdesk.com/docs/en/self
 # Pracise of backup server
 
 - Follow https://github.com/rustdesk/rustdesk-server-pro/discussions/184 to backup files and sync database on backup server
-- Migrate license to backup server 
+- Migrate license to backup server (or share the same license under the same source ip)
 - Change your dns (or reverse proxy, cloudflare etc, you can run the server totaly behind a reverse proxy via [Nginx stream](https://docs.nginx.com/nginx/admin-guide/load-balancer/tcp-udp-load-balancer/) or [WebSocket](https://github.com/rustdesk/rustdesk/wiki/FAQ#websocket)) to backup server
 
 # Failed to start `--server` process in `--service` process.