diff --git a/group_vars/mikrotik.yml b/group_vars/mikrotik.yml
index 278ec97..34aa542 100644
--- a/group_vars/mikrotik.yml
+++ b/group_vars/mikrotik.yml
@@ -1,6 +1,8 @@
 ---
 ansible_connection: ansible.netcommon.network_cli
 ansible_network_os: community.routeros.routeros
+# Bootstrap default. play_bootstrap.yml creates a named admin user and imports the
+# operator SSH key; thereafter override ansible_user to that named user (host_vars).
 ansible_user: admin
 ansible_ssh_private_key_file: "~/.ssh/id_ed25519"