diff --git a/protocol/rtcp/client.go b/protocol/rtcp/client.go
index d76a2cbd..c9ec9b93 100644
--- a/protocol/rtcp/client.go
+++ b/protocol/rtcp/client.go
@@ -257,6 +257,7 @@ func (c *Client) sequence() uint32 {
 
 // jitter returns the interarrival jitter as described by RTCP specifications:
 // https://tools.ietf.org/html/rfc3550
+// TODO(saxon): complete this.
 func (c *Client) jitter() uint32 {
 	return 0
 }