diff --git a/nixos/modules/services/networking/smokeping.nix b/nixos/modules/services/networking/smokeping.nix
index bc52d35c730c0..076469a154158 100644
--- a/nixos/modules/services/networking/smokeping.nix
+++ b/nixos/modules/services/networking/smokeping.nix
@@ -174,7 +174,7 @@ in
       };
       host = mkOption {
         type = types.nullOr types.str;
-        default = null;
+        default = "localhost";
         example = "192.0.2.1"; # rfc5737 example IP for documentation
         description = ''
           Host/IP to bind to for the web server.