diff --git a/docs/compose/.env b/docs/compose/.env
index b24056b1..9d1ca4d6 100644
--- a/docs/compose/.env
+++ b/docs/compose/.env
@@ -30,7 +30,7 @@ HOSTNAMES=mail.mailu.io,alternative.mailu.io,yetanother.mailu.io
 # Postmaster local part (will append the main mail domain)
 POSTMASTER=admin
 
-# Choose how secure connections will behave (value: letsencrypt, cert, notls)
+# Choose how secure connections will behave (value: letsencrypt, cert, notls, mail)
 TLS_FLAVOR=cert
 
 # Authentication rate limit (per source IP address)