diff --git a/modules/nixos-wiki/backup.nix b/modules/nixos-wiki/backup.nix
index 970edb7..0c73b1a 100644
--- a/modules/nixos-wiki/backup.nix
+++ b/modules/nixos-wiki/backup.nix
@@ -27,6 +27,9 @@ let
       '';
     };
 
+  # to restore:
+  # $ runuser -u postgres -- pg_restore --format=custom -d mediawiki < /tmp/db
+
   wiki-dump = pkgs.writeShellApplication
     {
       name = "wiki-dump";