diff --git a/protocol/rtsp/rtsp.go b/protocol/rtsp/rtsp.go
index 501ae5be..22d84236 100644
--- a/protocol/rtsp/rtsp.go
+++ b/protocol/rtsp/rtsp.go
@@ -137,9 +137,9 @@ func ReadResponse(r io.Reader) (*Response, error) {
 	}
 	resp.Proto = "RTSP"
 
-	_, err = fmt.Sscanf(s[5:12], "%d.%d %d", &resp.ProtoMajor, &resp.ProtoMinor, &resp.StatusCode)
-	if err != nil {
-		return nil, err
+	n, err := fmt.Sscanf(s[5:], "%d.%d %d", &resp.ProtoMajor, &resp.ProtoMinor, &resp.StatusCode)
+	if err != nil || n != 3 {
+		return nil, fmt.Errorf("could not Sscanf response, error: %v", err)
 	}
 
 	// Read headers.