diff --git a/wgengine/router_default.go b/wgengine/router_default.go
index 74f993b39..7aced4a82 100644
--- a/wgengine/router_default.go
+++ b/wgengine/router_default.go
@@ -13,5 +13,5 @@ import (
 )
 
 func NewUserspaceRouter(logf logger.Logf, tunname string, dev *device.Device, tuntap tun.Device, netChanged func()) Router {
-	return NewFakeRouter(logf, tunname, dev, tuntap)
+	return NewFakeRouter(logf, tunname, dev, tuntap, netChanged)
 }