diff --git a/hosts/xlab-gateway/networking.nix b/hosts/xlab-gateway/networking.nix
index 4da3b67..07cde8a 100644
--- a/hosts/xlab-gateway/networking.nix
+++ b/hosts/xlab-gateway/networking.nix
@@ -48,7 +48,7 @@
           chain postrouting {
             type nat hook postrouting priority filter; policy accept;
             oifname "wan99.0" masquerade
-            oifname "wg-to-wgnet" ip6 masquerade
+            oifname "wg-to-wgnet" meta nfproto ipv6 masquerade
           }
         }