diff --git a/news/4663.bugfix b/news/4663.bugfix
new file mode 100644
index 0000000000..708a1987dc
--- /dev/null
+++ b/news/4663.bugfix
@@ -0,0 +1 @@
+fix sitemap.xml.gz not is not compressed @dobri1408
diff --git a/src/express-middleware/sitemap.js b/src/express-middleware/sitemap.js
index 6525b540af..f593219456 100644
--- a/src/express-middleware/sitemap.js
+++ b/src/express-middleware/sitemap.js
@@ -5,7 +5,6 @@ export const sitemap = function (req, res, next) {
   generateSitemap(req).then((sitemap) => {
     if (Buffer.isBuffer(sitemap)) {
       res.set('Content-Type', 'application/x-gzip');
-      res.set('Content-Encoding', 'gzip');
       res.set('Content-Disposition', 'attachment; filename="sitemap.xml.gz"');
       res.send(sitemap);
     } else {