diff --git a/bash/hetzner-rescue.sh b/bash/hetzner-rescue.sh
index ee47d11..1dd40d1 100644
--- a/bash/hetzner-rescue.sh
+++ b/bash/hetzner-rescue.sh
@@ -219,11 +219,15 @@ function hetzner-rescue-wipe-12-10-10 {
     --level 0 \
     --raid-devices ${#devices[@]} \
     "${members[@]}"
+    # format boot
+    mkfs.ext4 \
+    -F \
+    -L 'boot' \
+    -U '6234a0eb-29a3-a847-1dbd-5ec4bada5579' \
+    '/dev/md/boot'
 }
 
 function hetzner-rescue-wipe-12-10-10-extra {
-    # format boot
-    mkfs.ext4 -F -L 'boot' '/dev/sda2'
     # read passphrase
     local passphrase
     echo -n 'PassPhrase: '