diff --git a/configuration.nix b/configuration.nix
index 3c58600..40ff309 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -24,6 +24,7 @@
       systemd-boot.enable = true;
       efi.canTouchEfiVariables = true;
     };
+    # https://nixos.org/manual/nixos/stable/#sec-luks-file-systems-fido2-systemd
     initrd = {
       systemd.enable = true;
       luks.devices."crypted" = {