diff --git a/src/net/ip.go b/src/net/ip.go
index d39aa66be94..b016bef144a 100644
--- a/src/net/ip.go
+++ b/src/net/ip.go
@@ -308,9 +308,8 @@ func ubtoa(dst []byte, start int, v byte) int {
 // It returns one of 4 forms:
 //   - "<nil>", if ip has length 0
 //   - dotted decimal ("192.0.2.1"), if ip is an IPv4 or IP4-mapped IPv6 address
-//   - IPv6 ("2001:db8::1"), if ip is a valid IPv6 address
+//   - IPv6 conforming to RFC 5952 ("2001:db8::1"), if ip is a valid IPv6 address
 //   - the hexadecimal form of ip, without punctuation, if no other cases apply
-// For IPv6, the returned forms conform to RFC 4291 and RFC 5952.
 func (ip IP) String() string {
 	p := ip