diff --git a/src/shrpx_https_upstream.cc b/src/shrpx_https_upstream.cc
index b2b6120d..5d373dd3 100644
--- a/src/shrpx_https_upstream.cc
+++ b/src/shrpx_https_upstream.cc
@@ -383,6 +383,7 @@ int htp_hdrs_completecb(http_parser *htp) {
 
       if (host) {
         req.authority = host->value;
+        req.no_authority = false;
       }
 
       if (handler->get_ssl()) {