diff --git a/Makefile.example b/Makefile.example
index dd4ead8..c2ff065 100644
--- a/Makefile.example
+++ b/Makefile.example
@@ -1,7 +1,7 @@
 TOPDIR = $(shell pwd)
 ARCH = x86
 NAME = eduos
-KERNDIRS = libkern kernel mm arch/$(ARCH)/kernel
+KERNDIRS = libkern kernel mm arch/$(ARCH)/kernel arch/$(ARCH)/mm
 SUBDIRS = $(KERNDIRS)
 
 # Set your own cross compiler tool chain prefix here