From 09cd024199063ac15c9489f04f4349cef05513a5 Mon Sep 17 00:00:00 2001
From: Emmanuel Engelhart <kelson@kiwix.org>
Date: Tue, 10 Nov 2015 22:24:56 +0100
Subject: [PATCH] Add VAR HTTP-HEADER if necessary

---
 src/server/kiwix-serve.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/server/kiwix-serve.cpp b/src/server/kiwix-serve.cpp
index 73f56cb..4254b8c 100644
--- a/src/server/kiwix-serve.cpp
+++ b/src/server/kiwix-serve.cpp
@@ -416,6 +416,7 @@ static int accessHandlerCallback(void *cls,
 
     /* Add if necessary the content-encoding */
     if (deflated) {
+      MHD_add_response_header(response, MHD_HTTP_HEADER_VARY, "Accept-Encoding");
       MHD_add_response_header(response, MHD_HTTP_HEADER_CONTENT_ENCODING, "deflate");
     }