diff --git a/examples/vars.yml b/examples/vars.yml
index b8be5f7a3..b6f20c277 100644
--- a/examples/vars.yml
+++ b/examples/vars.yml
@@ -3,7 +3,7 @@
 # Matrix user ids for your server will be of the form (`@user:example.com`).
 #
 # Note: this playbook does not touch the server referenced here.
-# Installation happens on another server ("matrix.example.com").
+# Installation happens on another server ("matrix.example.com", see `matrix_server_fqn_matrix`).
 #
 # If you've deployed using the wrong domain, you'll have to run the Uninstalling step,
 # because you can't change the Domain after deployment.