diff --git a/modules/initrd-contact-info.nix b/modules/initrd-contact-info.nix
index 69d9940..3d1eba5 100644
--- a/modules/initrd-contact-info.nix
+++ b/modules/initrd-contact-info.nix
@@ -5,6 +5,7 @@ let
   contact_name = "Daniel Langbein";
   # The file `phone-number` contains only one line with our phone number, e.g. +49 0173 ...
   # Be aware that the phone number will be written to the nix store in plaintext!
+  # TODO: strip the read string (no tailing newlines)
   contact_phone = (builtins.readFile ../secrets/phone-number);
   contact_mail = "daniel@systemli.org";