diff --git a/nginx.tmpl b/nginx.tmpl
index cab57e5..4a5e76b 100644
--- a/nginx.tmpl
+++ b/nginx.tmpl
@@ -86,6 +86,7 @@ server {
 
 {{ range $host, $containers := groupByMulti $ "Env.VIRTUAL_HOST" "," }}
 {{ $upstream_name := sha1 $host }}
+# {{ $host }}
 upstream {{ $upstream_name }} {
 {{ range $container := $containers }}
 	{{ $addrLen := len $container.Addresses }}