diff --git a/nixos/modules/system/boot/networkd.nix b/nixos/modules/system/boot/networkd.nix
index b0545363b33..3ca43a75c26 100644
--- a/nixos/modules/system/boot/networkd.nix
+++ b/nixos/modules/system/boot/networkd.nix
@@ -488,7 +488,7 @@ let
 
     vlanConfig = mkOption {
       default = {};
-      example = { Id = "4"; };
+      example = { Id = 4; };
       type = types.addCheck (types.attrsOf unitOption) checkVlan;
       description = ''
         Each attribute in this set specifies an option in the