--- a/net/stun.lua	Fri Mar 04 16:55:32 2022 +0100
+++ b/net/stun.lua	Fri Mar 04 16:58:28 2022 +0100
@@ -3,6 +3,7 @@
 local net = require "util.net";
 local random = require "util.random";
 local struct = require "util.struct";
+local bit32 = require"util.bitcompat";
 local sxor = require"util.strbitop".sxor;
 
 --- Public helpers