diff --git a/rpc2/transport.go b/rpc2/transport.go
index <HASH>..<HASH> 100644
--- a/rpc2/transport.go
+++ b/rpc2/transport.go
@@ -86,7 +86,7 @@ func (t *Transport) GetRemoteAddr() (ret net.Addr) {
 }
 
 func NewTransport(c net.Conn, l LogFactory, wef WrapErrorFunc) *Transport {
-	var mh codec.MsgpackHandle
+	mh := codec.MsgpackHandle{WriteExt : true}
 
 	buf := new(bytes.Buffer)
 	ret := &Transport{
This should address keybase/go#<I>