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diff --git a/toolbar/precog/monitor/monitor.go b/toolbar/precog/monitor/monitor.go
index bdda4fa..f65e98b 100644 (file)
--- a/toolbar/precog/monitor/monitor.go
+++ b/toolbar/precog/monitor/monitor.go
@@ -111,6 +111,7 @@ func (m *monitor) makeSwitch() (*p2p.Switch, error) {
                return nil, err
        }
 
+       // no need for lanDiscv, but passing &mdns.LANDiscover{} will cause NilPointer
        lanDiscv := mdns.NewLANDiscover(mdns.NewProtocol(), int(l.ExternalAddress().Port))
        return p2p.NewSwitch(m.nodeCfg, discv, lanDiscv, l, swPrivKey, listenAddr, m.cfg.NetworkID)
 }