diff --git a/nixos/hosts/osaka-vultr-01/default.nix b/nixos/hosts/osaka-vultr-01/default.nix
index 0685ae6e..d471c3ec 100644
--- a/nixos/hosts/osaka-vultr-01/default.nix
+++ b/nixos/hosts/osaka-vultr-01/default.nix
@@ -72,7 +72,7 @@
   networking.nat = {
     enable = true;
     externalInterface = "eno3";
-    internalInterface =  "wireguard0";
+    internalInterfaces =  [ "wireguard0" ];
     forwardPorts = [
       {
         destination = "10.100.0.2:80";