diff --git a/nixos/modules/services/networking/ddns-updater.nix b/nixos/modules/services/networking/ddns-updater.nix
index 85daa59fe66d..641325118945 100644
--- a/nixos/modules/services/networking/ddns-updater.nix
+++ b/nixos/modules/services/networking/ddns-updater.nix
@@ -16,7 +16,7 @@ in
 
     environment = lib.mkOption {
       type = lib.types.attrsOf lib.types.str;
-      description = "Environment variables to be set for the ddns-updater service. DATADIR is ignored to enable using systemd DynamicUser. For full list see https://github.com/qdm12/ddns-updater";
+      description = "Environment variables to be set for the ddns-updater service. DATADIR is ignored to enable using systemd DynamicUser. For full list see <https://github.com/qdm12/ddns-updater>";
       default = { };
     };
   };