diff --git a/integration-tests/nghttpx_test.go b/integration-tests/nghttpx_test.go
index eb03d015..861a067b 100644
--- a/integration-tests/nghttpx_test.go
+++ b/integration-tests/nghttpx_test.go
@@ -96,6 +96,44 @@ func TestH1H1ConnectFailure(t *testing.T) {
 	}
 }
 
+func TestH1H1GracefulShutdown(t *testing.T) {
+	st := newServerTester(nil, t, noopHandler)
+	defer st.Close()
+
+	res, err := st.http1(requestParam{
+		name: "TestH1H1GracefulShutdown-1",
+	})
+	if err != nil {
+		t.Fatalf("Error st.http1() = %v", err)
+	}
+
+	if got, want := res.status, 200; got != want {
+		t.Errorf("status: %v; want %v", got, want)
+	}
+
+	st.cmd.Process.Signal(syscall.SIGQUIT)
+
+	res, err = st.http1(requestParam{
+		name: "TestH1H1GracefulShutdown-2",
+	})
+	if err != nil {
+		t.Fatalf("Error st.http1() = %v", err)
+	}
+
+	if got, want := res.status, 200; got != want {
+		t.Errorf("status: %v; want %v", got, want)
+	}
+
+	if got, want := res.connClose, true; got != want {
+		t.Errorf("res.connClose: %v; want %v", got, want)
+	}
+
+	want := io.EOF
+	if _, err := st.conn.Read(nil); err == nil || err != want {
+		t.Errorf("st.conn.Read(): %v; want %v", err, want)
+	}
+}
+
 func TestH1H2ConnectFailure(t *testing.T) {
 	st := newServerTester([]string{"--http2-bridge"}, t, noopHandler)
 	defer st.Close()
diff --git a/integration-tests/server_tester.go b/integration-tests/server_tester.go
index 47bf7c0d..dc2376b0 100644
--- a/integration-tests/server_tester.go
+++ b/integration-tests/server_tester.go
@@ -275,9 +275,10 @@ func (st *serverTester) http1(rp requestParam) (*serverResponse, error) {
 	resp.Body.Close()
 
 	res := &serverResponse{
-		status: resp.StatusCode,
-		header: resp.Header,
-		body:   respBody,
+		status:    resp.StatusCode,
+		header:    resp.Header,
+		body:      respBody,
+		connClose: resp.Close,
 	}
 
 	return res, nil
@@ -534,6 +535,7 @@ type serverResponse struct {
 	connErr           bool                 // true if HTTP/2 connection error
 	spdyGoAwayErrCode spdy.GoAwayStatus    // status code received in SPDY RST_STREAM
 	spdyRstErrCode    spdy.RstStreamStatus // status code received in SPDY GOAWAY
+	connClose         bool                 // Conection: close is included in response header in HTTP/1 test
 }
 
 func cloneHeader(h http.Header) http.Header {
diff --git a/src/shrpx_https_upstream.cc b/src/shrpx_https_upstream.cc
index 9ef2a9e3..f6be0aaa 100644
--- a/src/shrpx_https_upstream.cc
+++ b/src/shrpx_https_upstream.cc
@@ -664,6 +664,12 @@ int HttpsUpstream::on_downstream_header_complete(Downstream *downstream) {
     return 0;
   }
 
+  // after graceful shutdown commenced, add connection: close header
+  // field.
+  if (worker_config->graceful_shutdown) {
+    downstream->set_response_connection_close(true);
+  }
+
   // We check downstream->get_response_connection_close() in case when
   // the Content-Length is not available.
   if (!downstream->get_request_connection_close() &&