diff --git a/machine.go b/machine.go
index 40fabee6..3e9786a2 100644
--- a/machine.go
+++ b/machine.go
@@ -50,6 +50,8 @@ func (m Machine) isAlreadyRegistered() bool {
 	return m.Registered
 }
 
+// toNode converts a Machine into a Tailscale Node. includeRoutes is false for shared nodes
+// as per the expected behaviour in the official SaaS
 func (m Machine) toNode(includeRoutes bool) (*tailcfg.Node, error) {
 	nKey, err := wgkey.ParseHex(m.NodeKey)
 	if err != nil {