diff --git a/README.md b/README.md
index 1ecdf32..92bff30 100644
--- a/README.md
+++ b/README.md
@@ -20,6 +20,9 @@ SSH_KEY=<absolute/path/to/ssh/private/key>
 ansible-playbook setup-ssh.yml --ask-vault-pass -e "setup_ssh_logname=$LOGUSER" -e "setup_ssh_key=$SSH_KEY"
 ```
 
+This playbook also adds `rhodium.n39.eu` (OpenWRT router), but our Ansible cannot set up SSH keys (yet).
+Please [add your key to OpenWRT manually](https://openwrt.org/docs/guide-user/security/dropbear.public-key.auth#from_the_luci_web_interface).
+
 ## Edit vault encrypted vars files
 
 ```bash