diff --git a/docs/source/howto/configuration/config-proxy.md b/docs/source/howto/configuration/config-proxy.md
index 8c4dc37313..04efad6ff3 100644
--- a/docs/source/howto/configuration/config-proxy.md
+++ b/docs/source/howto/configuration/config-proxy.md
@@ -79,7 +79,7 @@ server {
     location / {
         proxy_pass http://127.0.0.1:8000;
         proxy_set_header X-Real-IP $remote_addr;
-        proxy_set_header Host $host;
+        proxy_set_header Host $http_host;
         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
 
         # websocket headers