diff --git a/machine-confs/helium.nix b/machine-confs/helium.nix
index bab3eb5..9dd28de 100644
--- a/machine-confs/helium.nix
+++ b/machine-confs/helium.nix
@@ -82,6 +82,11 @@
   ];
 
   boot = {
+    initrd.luks.devices."luks-f6e1979b-0dee-4ee9-8170-10490019854b" = {
+      keyFileSize = 8192;
+      keyFile = "/dev/disk/by-id/usb-Kingston_DataTraveler_3.0_E0D55EA5741216B0A93E02B3-0:0";
+      fallbackToPassword = true;
+    };
     resumeDevice = "/dev/mapper/luks-f6e1979b-0dee-4ee9-8170-10490019854b";
     kernelParams = [ "resume_offset=44537856" ];