diff --git a/src/net/dnsclient_unix.go b/src/net/dnsclient_unix.go
index 3b0293025d..73630faa49 100644
--- a/src/net/dnsclient_unix.go
+++ b/src/net/dnsclient_unix.go
@@ -9,7 +9,6 @@
 
 // TODO(rsc):
 //	Could potentially handle many outstanding lookups faster.
-//	Could have a small cache.
 //	Random UDP source port (net.Dial should do that for us).
 //	Random request IDs.