diff --git a/docs/production/deployment.md b/docs/production/deployment.md
index f72120dab8..3cfcb2f18c 100644
--- a/docs/production/deployment.md
+++ b/docs/production/deployment.md
@@ -483,7 +483,7 @@ that your Zulip server sits at `https://10.10.10.10:443`; see
            location / {
                    proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;
                    proxy_set_header        X-Forwarded-Proto $scheme;
-                   proxy_set_header        Host $http_host;
+                   proxy_set_header        Host $host;
                    proxy_http_version      1.1;
                    proxy_buffering         off;
                    proxy_read_timeout      20m;
diff --git a/scripts/lib/sharding.py b/scripts/lib/sharding.py
index 878dc86094..6107a54d36 100755
--- a/scripts/lib/sharding.py
+++ b/scripts/lib/sharding.py
@@ -44,7 +44,7 @@ def write_updated_configs() -> None:
             sharding_json_f.write("{}\n")
             return
 
-        nginx_sharding_conf_f.write("map $http_host $tornado_server {\n")
+        nginx_sharding_conf_f.write("map $host $tornado_server {\n")
         nginx_sharding_conf_f.write("    default http://tornado9800;\n")
         shard_map: Dict[str, Union[int, List[int]]] = {}
         shard_regexes: List[Tuple[str, Union[int, List[int]]]] = []