diff --git a/Makefile b/Makefile
index e4488da..16e3103 100644
--- a/Makefile
+++ b/Makefile
@@ -21,5 +21,5 @@ run: iso
 	qemu-system-i386 -d int -M smm=off -cdrom generated-iso.iso
 
 clean:
-	rm -rf *.o kernel.bin *.iso isodir/
+	rm -rf *.o **/**.o kernel.bin *.iso isodir/