diff --git a/14-checkpoint/Makefile b/14-checkpoint/Makefile
index 4f90fbd..b611257 100644
--- a/14-checkpoint/Makefile
+++ b/14-checkpoint/Makefile
@@ -43,4 +43,4 @@ debug: os-image.bin kernel.elf
 
 clean:
 	rm -rf *.bin *.dis *.o os-image.bin *.elf
-	rm -rf kernel/*.o boot/*.bin drivers/*.o
+	rm -rf kernel/*.o boot/*.bin drivers/*.o boot/*.o
diff --git a/14-checkpoint/boot/kernel_entry.o b/14-checkpoint/boot/kernel_entry.o
deleted file mode 100644
index d421a6a..0000000
Binary files a/14-checkpoint/boot/kernel_entry.o and /dev/null differ