diff --git a/nixos/modules/services/networking/atticd.nix b/nixos/modules/services/networking/atticd.nix
index 3984c434c60e..43d66ef06238 100644
--- a/nixos/modules/services/networking/atticd.nix
+++ b/nixos/modules/services/networking/atticd.nix
@@ -103,7 +103,7 @@ in
       settings = lib.mkOption {
         description = ''
           Structured configurations of atticd.
-          See https://github.com/zhaofengli/attic/blob/main/server/src/config-template.toml
+          See <https://github.com/zhaofengli/attic/blob/main/server/src/config-template.toml>
         '';
         type = format.type;
         default = { };