diff --git a/Makefile b/Makefile
index c70e00f..db1ea66 100644
--- a/Makefile
+++ b/Makefile
@@ -38,7 +38,7 @@ programs/%.com: programs/%.asm
 	nasm -s -I lib -o $@ $<
 
 fdimage.img: boot/fat.bs $(DISTFILES)
-	mformat -C -i $@ -f $(FLOPPY) -B boot/floppy.bs ::
+	mformat -C -i $@ -f $(FLOPPY) -B boot/fat.bs ::
 	mcopy -i $@ $(DISTFILES) ::
 
 hdimage.img: boot/mbr.bs fdimage.img