diff --git a/protocol/rtsp/client.go b/protocol/rtsp/client.go
index 0d0fdc0a..1d047bc6 100644
--- a/protocol/rtsp/client.go
+++ b/protocol/rtsp/client.go
@@ -37,16 +37,16 @@ import (
 
 // Client describes an RTSP Client.
 type Client struct {
-	cSeq   int
-	urlStr string
-	url    *url.URL
-	conn   net.Conn
+	cSeq int
+	addr string
+	url  *url.URL
+	conn net.Conn
 }
 
 // NewClient returns a pointer to a new Client. The URL u will be parsed and
 // a connection to the RTSP server will be made.
 func NewClient(u string) (*Client, error) {
-	s := &Client{urlStr: u}
+	s := &Client{addr: u}
 	var err error
 	s.url, err = url.Parse(u)
 	if err != nil {
@@ -71,7 +71,7 @@ func (s *Client) Options() (*Response, error) {
 
 // Setup forms and sends an RTSP request of method SETUP to the RTSP server.
 func (s *Client) Setup(track, transport string) (*Response, error) {
-	url, err := url.Parse(s.urlStr + "/" + track)
+	url, err := url.Parse(s.addr + "/" + track)
 	if err != nil {
 		return nil, err
 	}