diff --git a/rootfs/etc/nginx/template/nginx.tmpl b/rootfs/etc/nginx/template/nginx.tmpl
index f012957af..b9cd4ae5c 100755
--- a/rootfs/etc/nginx/template/nginx.tmpl
+++ b/rootfs/etc/nginx/template/nginx.tmpl
@@ -1173,11 +1173,13 @@ stream {
             {{ end }}
 
             {{/* By default use vhost as Host to upstream, but allow overrides */}}
+            {{ if not (eq $proxySetHeader "grpc_set_header") }}
             {{ if not (empty $location.UpstreamVhost) }}
             {{ $proxySetHeader }} Host                   "{{ $location.UpstreamVhost }}";
             {{ else }}
             {{ $proxySetHeader }} Host                   $best_http_host;
             {{ end }}
+            {{ end }}
 
             # Pass the extracted client certificate to the backend
             {{ if not (empty $server.CertificateAuth.CAFileName) }}