diff --git a/src/net/mail/message.go b/src/net/mail/message.go
index 765abe2521..45a995ec72 100644
--- a/src/net/mail/message.go
+++ b/src/net/mail/message.go
@@ -49,7 +49,7 @@ type Message struct {
 
 // ReadMessage reads a message from r.
 // The headers are parsed, and the body of the message will be available
-// for reading from r.
+// for reading from msg.Body.
 func ReadMessage(r io.Reader) (msg *Message, err error) {
 	tp := textproto.NewReader(bufio.NewReader(r))