diff --git a/protocol/rtp/client.go b/protocol/rtp/client.go
index fb5e0b13..95cbe128 100644
--- a/protocol/rtp/client.go
+++ b/protocol/rtp/client.go
@@ -114,6 +114,7 @@ func (c *Client) Stop() {
 	c.wg.Wait()
 }
 
+// Err returns the client err channel as receive only.
 func (c *Client) Err() <-chan error {
 	return c.err
 }