diff --git a/nixos/modules/services/networking/ddclient.nix b/nixos/modules/services/networking/ddclient.nix
index 8f4fb0bc78d4..a67f0c5de9ba 100644
--- a/nixos/modules/services/networking/ddclient.nix
+++ b/nixos/modules/services/networking/ddclient.nix
@@ -126,7 +126,7 @@ with lib;
         default = "dyndns2";
         type = str;
         description = lib.mdDoc ''
-          Protocol to use with dynamic DNS provider (see https://sourceforge.net/p/ddclient/wiki/protocols).
+          Protocol to use with dynamic DNS provider (see https://ddclient.net/protocols.html ).
         '';
       };