diff --git a/modules/services/wireguard.nix b/modules/services/wireguard.nix
index c78c78f..1ecaef5 100644
--- a/modules/services/wireguard.nix
+++ b/modules/services/wireguard.nix
@@ -6,7 +6,7 @@
 }:
 let
   port = 51820;
-  interface = config.my.interfaces.${config.hostName};
+  interface = config.my.interfaces.${config.networking.hostName};
 in
 {
   options.my.services.wireguard.enable = lib.mkEnableOption "enable";