diff --git a/fs/proc/array.c b/fs/proc/array.c
index 61bea3a..cfe7f93 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -61,6 +61,7 @@
 #include <linux/string.h>
 #include <linux/mman.h>
 #include <linux/sched/mm.h>
+#include <linux/sched/numa_balancing.h>
 #include <linux/proc_fs.h>
 #include <linux/ioport.h>
 #include <linux/uaccess.h>