diff --git a/Makefile b/Makefile
index 61f3b48..eef5ab7 100644
--- a/Makefile
+++ b/Makefile
@@ -88,7 +88,7 @@ part.img: fatc.bs $(DISTFILES)
 	mattrib -i $@ +s ::rdos ::rdos/kernel.bs
 
 hdd.img: part.img mbr.bs
-	cat $< > $@
+	cat mbr.bs part.img > $@
 
 clean:
 	rm -f *.com *.bs *.0 *.lst *.img *.bin *.rom