diff --git a/mm/Makefile b/mm/Makefile
index b424d5e..56f8eed 100644
--- a/mm/Makefile
+++ b/mm/Makefile
@@ -79,3 +79,4 @@
 obj-$(CONFIG_PAGE_EXTENSION) += page_ext.o
 obj-$(CONFIG_CMA_DEBUGFS) += cma_debug.o
 obj-$(CONFIG_USERFAULTFD) += userfaultfd.o
+obj-$(CONFIG_IDLE_PAGE_TRACKING) += page_idle.o