diff --git a/nixos/modules/tasks/network-interfaces.nix b/nixos/modules/tasks/network-interfaces.nix
index 2a17ae934f8a..f4851988d63d 100644
--- a/nixos/modules/tasks/network-interfaces.nix
+++ b/nixos/modules/tasks/network-interfaces.nix
@@ -274,7 +274,7 @@ let
 
       virtualType = mkOption {
         default = if hasPrefix "tun" name then "tun" else "tap";
-        defaultText = ''if hasPrefix "tun" name then "tun" else "tap"'';
+        defaultText = literalExample ''if hasPrefix "tun" name then "tun" else "tap"'';
         type = with types; enum [ "tun" "tap" ];
         description = ''
           The type of interface to create.