diff --git a/examples/host-vars.yml b/examples/host-vars.yml
index 64d12097..e4e08bda 100644
--- a/examples/host-vars.yml
+++ b/examples/host-vars.yml
@@ -4,6 +4,9 @@
 # Note: this playbook does not touch the server referenced here.
 # Installation happens on another server ("matrix.<matrix-domain>").
 #
+# Plesae remember, if you've deployed the wrong URL, you have to run the Uninstalling step, 
+# cause you can't change the Domain after deployment.
+#
 # Example value: example.com
 matrix_domain: YOUR_BARE_DOMAIN_NAME_HERE