diff --git a/haproxy.cfg b/haproxy.cfg
index f085282..fa48411 100644
--- a/haproxy.cfg
+++ b/haproxy.cfg
@@ -40,6 +40,8 @@ frontend http-in
 	mode http
         reqadd X-Forwarded-Proto:\ http
 
+	http-response set-header X-Frontend lv1
+
         use_backend letsencrypt if { path_beg -i /.well-known/acme-challenge }
 
         default_backend redirect-to-https
@@ -58,6 +60,8 @@ frontend http-ac-in
 	mode http
 	reqadd X-Forwarded-Proto:\ http
 
+	http-response set-header X-Frontend lv1
+
 	use_backend letsencrypt-lv1 if { path_beg -i /.well-known/acme-challenge }
 
 backend letsencrypt-lv1