diff --git a/docs/source/reference/config-proxy.md b/docs/source/reference/config-proxy.md
index cd56025c..181ebf41 100644
--- a/docs/source/reference/config-proxy.md
+++ b/docs/source/reference/config-proxy.md
@@ -86,6 +86,7 @@ server {
         proxy_http_version 1.1;
         proxy_set_header Upgrade $http_upgrade;
         proxy_set_header Connection $connection_upgrade;
+        proxy_set_header X-Scheme $scheme;
 
         proxy_buffering off;
     }