diff --git a/doc/guix.texi b/doc/guix.texi
index 858d5751bf..796ac0028f 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -2728,20 +2728,20 @@ the Cryptsetup/LUKS utilities to do that (see @inlinefmtifelse{html,
 @code{man cryptsetup}} for more information).
 
 @quotation Warning
-Note that GRUB can unlock LUKS2 devices since version 2.06, but only
-supports the PBKDF2 key derivation function, which is not the default
-for @command{cryptsetup luksFormat}.  You can check which key derivation
-function is being used by a device by running @command{cryptsetup
-luksDump @var{device}}, and looking for the PBKDF field of your
-keyslots.
+While efforts are in progress to extend support to LUKS2, please note
+that Guix only supports devices of type LUKS1 at the moment. You can
+verify that your existing LUKS device is of the right type by running
+@command{cryptsetup luksDump @var{device}}. Alternatively, you can
+create a new LUKS1 device with @command{cryptsetup luksFormat --type
+luks1 @var{device}}.
 @end quotation
 
 Assuming you want to store the root partition on @file{/dev/sda2}, the
-command sequence to format it as a LUKS2 partition would be along these
+command sequence to format it as a LUKS1 partition would be along these
 lines:
 
 @example
-cryptsetup luksFormat --type luks2 --pbkdf pbkdf2 /dev/sda2
+cryptsetup luksFormat --type luks1 /dev/sda2
 cryptsetup open /dev/sda2 my-partition
 mkfs.ext4 -L my-root /dev/mapper/my-partition
 @end example