diff --git a/protocol/rtsp/rtsp.go b/protocol/rtsp/rtsp.go
index 1bcd55b1..fda744d8 100644
--- a/protocol/rtsp/rtsp.go
+++ b/protocol/rtsp/rtsp.go
@@ -100,7 +100,7 @@ type Response struct {
 	ProtoMinor    int
 	StatusCode    int
 	Status        string
-	ContentLength int64
+	ContentLength int
 	Header        http.Header
 	Body          io.ReadCloser
 }
@@ -184,7 +184,10 @@ func ReadResponse(r io.Reader) (*Response, error) {
 	}
 
 	// Get the content length from the header.
-	resp.ContentLength, _ = strconv.ParseInt(resp.Header.Get("Content-Length"), 10, 64)
+	resp.ContentLength, err = strconv.Atoi(resp.Header.Get("Content-Length"))
+	if err != nil {
+		return nil, err
+	}
 
 	resp.Body = closer{b, r}
 	return resp, nil