diff --git a/src/shrpx_http_downstream_connection.cc b/src/shrpx_http_downstream_connection.cc
index f5a2d7ad..d1627919 100644
--- a/src/shrpx_http_downstream_connection.cc
+++ b/src/shrpx_http_downstream_connection.cc
@@ -164,7 +164,8 @@ int HttpDownstreamConnection::push_request_headers()
     hdrs += "\r\n";
   }
 
-  if(downstream_->get_request_http2_expect_body() &&
+  if(downstream_->get_request_method() != "CONNECT" &&
+     downstream_->get_request_http2_expect_body() &&
      downstream_->get_norm_request_header("content-length") == end_headers) {
 
     downstream_->set_chunked_request(true);