diff --git a/Makefile b/Makefile
index ac41d13..13d32e4 100644
--- a/Makefile
+++ b/Makefile
@@ -7,7 +7,9 @@ vbr.bin: boot/vbr.asm
 	nasm -s -o $@ -I lib $<
 
 fdimage.img: vbr.bin kernel.com
-	cat vbr.bin kernel.com > $@
+	dd if=/dev/zero bs=512 count=720 of=$@
+	mformat -i $@ -f 360 -B vbr.bin -v "BOOT2B" ::
+	mcopy -i fdimage.img kernel.com ::boot.bin
 
 clean:
-	rm -f *.com
+	rm -f *.com *.bin *.img