diff --git a/nixos/modules/programs/shadow.nix b/nixos/modules/programs/shadow.nix
index 27a18c726a3..5fcd2133a7e 100644
--- a/nixos/modules/programs/shadow.nix
+++ b/nixos/modules/programs/shadow.nix
@@ -48,6 +48,7 @@ in
         Rather, it should be the path of a symlink that points to the
         actual shell in the Nix store.
       '';
+      example = "/run/current-system/sw/bin/zsh";
       type = types.path;
     };