diff --git a/export-image/prerun.sh b/export-image/prerun.sh
index 8bbc566..21652f6 100755
--- a/export-image/prerun.sh
+++ b/export-image/prerun.sh
@@ -50,7 +50,7 @@ for FEATURE in metadata_csum 64bit; do
 	    ROOT_FEATURES="^$FEATURE,$ROOT_FEATURES"
 	fi
 done
-mkdosfs -n boot -F 32 -v "$BOOT_DEV" > /dev/null
+mkdosfs -I -n boot -F 32 -v "$BOOT_DEV" > /dev/null
 mkfs.ext4 -L rootfs -O "$ROOT_FEATURES" "$ROOT_DEV" > /dev/null
 
 mount -v "$ROOT_DEV" "${ROOTFS_DIR}" -t ext4