diff --git a/distillery/system_install.sh b/distillery/system_install.sh
index 197ca8a..b3b406a 100755
--- a/distillery/system_install.sh
+++ b/distillery/system_install.sh
@@ -74,7 +74,7 @@ install_resource_dir "compose/ssh" "$DEPLOY_SSH_DIR"
 
 # setup the lesencrypt host for the default domain
 if [ -n "$LETSENCRYPT_HOST" ]; then
-    LETSENCRYPT_HOST="$DEFAULT_DOMAIN"
+    LETSENCRYPT_HOST="$SELF_DOMAIN_SPEC"
 fi;
 
 log_info " => Writing 'self' configuration file"