client.go | 1 +

diff --git a/client.go b/client.go
index db0fae1889084549ddc05dcace5100bf6e97629c..c6801cf10740037ef5ac7c0cbfd61cff2371a4ae 100644
--- a/client.go
+++ b/client.go
@@ -173,6 +173,7 @@
 func NewClient(cfg *ClientConfig) (cl *Client, err error) {
 	if cfg == nil {
 		cfg = NewDefaultClientConfig()
+		cfg.ListenPort = 0
 	}
 	defer func() {
 		if err != nil {