diff --git a/pacman-zbm-syslinux-regen.sh b/pacman-zbm-syslinux-regen.sh
index 3a66e3c..d59aafa 100644
--- a/pacman-zbm-syslinux-regen.sh
+++ b/pacman-zbm-syslinux-regen.sh
@@ -2,7 +2,7 @@
 
 boot_dir='/boot/syslinux'
 boot_dir="${boot_dir%/}"
-boot_disk="$(findmnt --noheadings --target "${boot_dir}" --output 'SOURCE')" || {
+boot_fs="$(findmnt --noheadings --target "${boot_dir}" --output 'SOURCE')" || {
     printf -- '%s\n' \
         'Unable to identify boot drive for '"'${boot_dir}'"' boot dir.' \
         'Cowardly exiting. No syslinux files nor MBR were overwritten.'
@@ -15,6 +15,14 @@ if [[ "$(<<<"${boot_fs}" wc -l)" -gt '1' ]]; then
     exit 1
 fi
 
+boot_disk="$(lsblk --output 'NAME' --json --tree | jq --raw-output '.[][] | select(.children | length > 0) | select(.children[].name=="'"${boot_fs}"'") | .name')"
+if [[ ! "${boot_disk}" ]]; then
+    # There's no parent drive over "${boot_fs}" meaning "${boot_fs}" itself
+    # already is the parent. This is a file system on a drive and not on a
+    # partition.
+    boot_disk="${boot_fs}"
+fi
+
 find "${boot_dir}" -type f -iname '*.c32' -delete
 rsync -a '/usr/lib/syslinux/bios/'*'.c32' "${boot_dir}"'/'
 extlinux --install "${boot_dir}"