diff --git a/modules/filesystems.nix b/modules/filesystems.nix
index bbcf51c..f13fbf0 100644
--- a/modules/filesystems.nix
+++ b/modules/filesystems.nix
@@ -2,6 +2,7 @@
 
 {
   # Note: for f2fs, create it with "sudo mkfs.f2fs -l root -i -O extra_attr,flexible_inline_xattr,inode_checksum,sb_checksum,compression,encrypt,lost_found /dev/sdxY"
+  # For encryption see "man f2fscrypt"
   fileSystems."/".options = lib.mkMerge [
     [ "noatime" ]
     (lib.mkIf (config.fileSystems."/".fsType == "f2fs") (lib.mkAfter [