diff --git a/src/pkg/net/tcpsock_posix.go b/src/pkg/net/tcpsock_posix.go
index f886a6b5c5..e6b1937fb2 100644
--- a/src/pkg/net/tcpsock_posix.go
+++ b/src/pkg/net/tcpsock_posix.go
@@ -357,5 +357,5 @@ func (l *TCPListener) SetDeadline(t time.Time) error {
 
 // File returns a copy of the underlying os.File, set to blocking mode.
 // It is the caller's responsibility to close f when finished.
-// Closing c does not affect f, and closing f does not affect c.
+// Closing l does not affect f, and closing f does not affect l.
 func (l *TCPListener) File() (f *os.File, err error) { return l.fd.dup() }
diff --git a/src/pkg/net/unixsock_posix.go b/src/pkg/net/unixsock_posix.go
index ea411a65f0..57d784c71c 100644
--- a/src/pkg/net/unixsock_posix.go
+++ b/src/pkg/net/unixsock_posix.go
@@ -404,7 +404,7 @@ func (l *UnixListener) SetDeadline(t time.Time) (err error) {
 
 // File returns a copy of the underlying os.File, set to blocking mode.
 // It is the caller's responsibility to close f when finished.
-// Closing c does not affect f, and closing f does not affect c.
+// Closing l does not affect f, and closing f does not affect l.
 func (l *UnixListener) File() (f *os.File, err error) { return l.fd.dup() }
 
 // ListenUnixgram listens for incoming Unix datagram packets addressed to the