diff --git a/nixos/hosts/osaka-vultr-01/wireguard.nix b/nixos/hosts/osaka-vultr-01/wireguard.nix
index 6dec6996..b2d751fa 100644
--- a/nixos/hosts/osaka-vultr-01/wireguard.nix
+++ b/nixos/hosts/osaka-vultr-01/wireguard.nix
@@ -1,6 +1,6 @@
 { pkgs, config, lib, ... }: {
   networking.firewall.allowedUDPPorts = [ 51820 ];
-  networking.firewall.wireguard0.allowedTCPPorts = [ 22 ];
+  networking.firewall.interfaces.wireguard0.allowedTCPPorts = [ 22 ];
 
   # Set up the secrets file:
   sops.secrets."wireguard_keys/osaka-vultr-01" = {