diff --git a/rpc/http.go b/rpc/http.go
index 9c5a5cc0f..18404c060 100644
--- a/rpc/http.go
+++ b/rpc/http.go
@@ -181,6 +181,7 @@ func (hc *httpConn) doRequest(ctx context.Context, msg interface{}) (io.ReadClos
 		return nil, err
 	}
 	req.ContentLength = int64(len(body))
+	req.GetBody = func() (io.ReadCloser, error) { return ioutil.NopCloser(bytes.NewReader(body)), nil }
 
 	// set headers
 	hc.mu.Lock()