diff --git a/Makefile b/Makefile
index 0b0d566..fbb0f23 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 ordos.img: BOOT.BIN IO.SYS ORDOS.SYS COMMAND.COM debug.com edlin.com exe2bin.exe link.exe masm.exe
 	rm -f ordos.img
-	mkdosfs -C $@ -M 0xff 320
+	mkfs.fat -C $@ -M 0xff 320
 	rw -I 0x7c00 -i BOOT.BIN -o $@ -c 512
 	mcopy -i $@ IO.SYS ::
 	mcopy -i $@ ORDOS.SYS ::