diff --git a/scripts/http_host/nginx_site.conf b/scripts/http_host/nginx_site.conf
index 6760c03..1f8d4b9 100644
--- a/scripts/http_host/nginx_site.conf
+++ b/scripts/http_host/nginx_site.conf
@@ -13,6 +13,7 @@ server {
         try_files $uri @empty;
     }
 
+    # we need to handle missing tiles as valid request returning empty string
     location @empty {
         default_type application/x-protobuf;
         return 200 '';