From bd6e18b7fef1076247c737b9d5e8ad30d43bd1d2 Mon Sep 17 00:00:00 2001
From: Nikolay Kim <fafhrd91@gmail.com>
Date: Fri, 4 May 2018 13:38:17 -0700
Subject: [PATCH] update migration doc

---
 MIGRATION.md | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/MIGRATION.md b/MIGRATION.md
index 4ecff7b2f..e2da4004d 100644
--- a/MIGRATION.md
+++ b/MIGRATION.md
@@ -15,6 +15,10 @@
 
 * `FromRequest::Result` has to implement `Into<Reply<Self>>`
 
+* [`Responder::respond_to()`](
+  https://actix.rs/actix-web/actix_web/trait.Responder.html#tymethod.respond_to)
+  is generic over `S`
+
 * `HttpRequest::query()` is deprecated. Use `Query` extractor.
 
    ```rust