diff --git a/mm/bootmem.c b/mm/bootmem.c
index 9b13446..eff2242 100644
--- a/mm/bootmem.c
+++ b/mm/bootmem.c
@@ -10,6 +10,7 @@
  */
 #include <linux/init.h>
 #include <linux/pfn.h>
+#include <linux/slab.h>
 #include <linux/bootmem.h>
 #include <linux/module.h>
 #include <linux/kmemleak.h>