diff --git a/roles/acme/certificate/defaults/main.yml b/roles/acme/certificate/defaults/main.yml
index 7759c46..e733e5f 100644
--- a/roles/acme/certificate/defaults/main.yml
+++ b/roles/acme/certificate/defaults/main.yml
@@ -1,5 +1,7 @@
 ---
 
+# domain
+
 acme_certificate_prefix: "{{ acme_certificates_directory }}/{{ domain }}"
 acme_certificate_location: "{{ acme_certificate_prefix }}.crt"
 acme_key_location: "{{ acme_certificate_prefix }}.key"