diff --git a/tun/tun_darwin.go b/tun/tun_darwin.go
index f692bbe..6262321 100644
--- a/tun/tun_darwin.go
+++ b/tun/tun_darwin.go
@@ -1,3 +1,5 @@
+// +build !ios
+
 /* SPDX-License-Identifier: GPL-2.0
  *
  * Copyright (C) 2017-2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.