diff --git a/scripts/create-disk.sh b/scripts/create-disk.sh
index eb56221..cbd96f6 100755
--- a/scripts/create-disk.sh
+++ b/scripts/create-disk.sh
@@ -57,7 +57,7 @@ if [[ "$OSTYPE" == "linux-gnu"* ]]; then
 
         # get first partition
         firstpart=$(lsblk -ilp -o NAME $ld | tr '\n' ' ' | awk '{print $3}')
-        mkfs.vfat -v -F32 $firstpart
+        mkfs.vfat -v -F32 -S 512 $firstpart
 
         # copy MBR while preserving partition table
         dd if=$mbr_file of=$ld bs=1 count=440
diff --git a/scripts/loop_setup.sfdisk b/scripts/loop_setup.sfdisk
index d18859f..286180d 100755
--- a/scripts/loop_setup.sfdisk
+++ b/scripts/loop_setup.sfdisk
@@ -1,4 +1,5 @@
 label: dos
 unit: sectors
+sector-size: 512
 
-start=        2048, type=b, bootable
+start=        2048, type=c, bootable