diff --git a/CHANGES.rst b/CHANGES.rst
index 8f2d5415c95..b5b389379e2 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -36,7 +36,8 @@ CHANGES
 
 - FileSender will send gzipped response if gzip version available #1426
 
--
+- Don't override `Content-Length` header in `web.Response` if no body
+  was set #1400
 
 -