diff --git a/src/shrpx_https_upstream.cc b/src/shrpx_https_upstream.cc
index 458b5426..5a45c24f 100644
--- a/src/shrpx_https_upstream.cc
+++ b/src/shrpx_https_upstream.cc
@@ -436,6 +436,7 @@ int htp_hdrs_completecb(llhttp_t *htp) {
 
       if (host) {
         req.authority = host->value;
+        req.no_authority = false;
       }
 
       if (handler->get_ssl()) {