diff --git a/tun/netstack/tun.go b/tun/netstack/tun.go
index 37c879d5..efad5641 100644
--- a/tun/netstack/tun.go
+++ b/tun/netstack/tun.go
@@ -157,6 +157,7 @@ func (tun *netTun) Flush() error {
 
 func (tun *netTun) Close() error {
 	tun.stack.RemoveNIC(1)
+	tun.stack.Close()
 
 	if tun.events != nil {
 		close(tun.events)