diff --git a/content/self-host/install/_index.en.md b/content/self-host/install/_index.en.md
index 2d63cfe..9d82ca8 100644
--- a/content/self-host/install/_index.en.md
+++ b/content/self-host/install/_index.en.md
@@ -232,6 +232,8 @@ Change `rustdesk.exe` to rustdesk-`host=<host-ip-or-name>,key=<public-key-string
 {{% notice note %}}
 You need to set both `host` and `key`, missing either one will not work.
 
+Optionally add an `#` character after the key, before the `.exe` part as a delimiter, to avoid the key being mangled if Windows or the browser renames the file when downloading duplicated names.
+
 If there are invalid characters in the key which can not be used in a Windows file name, please remove the
 `id_ed25519` file from your server and restart `hbbs`/`hbbr`. This will cause the `id_ed25519.pub` file to regenerate. You may need to
 repeat this process until you get valid characters.