diff --git a/zlibs/imaging b/zlibs/imaging
index a5f8caf..4d7faee 100644
--- a/zlibs/imaging
+++ b/zlibs/imaging
@@ -44,6 +44,8 @@ image_partition_raw_dos() {
 	parted $workdir/${image_name}.img --script -- mklabel msdos
 	parted $workdir/${image_name}.img --script -- mkpart primary ${parted_boot}
 	parted $workdir/${image_name}.img --script -- mkpart primary ${parted_root}
+	[ -n "$bootable_part" ] && \
+	    parted "$workdir/${image_name}.img" --script -- set "$bootable_part" boot on
 
 	## get loopdevice (see ./helpers)
 	findloopdev