diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index fd391fc00ed8..b5546a15206c 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -2482,7 +2482,7 @@ static void reset_ptenuma_scan(struct task_struct *p)
  * The expensive part of numa migration is done from task_work context.
  * Triggered from task_tick_numa().
  */
-void task_numa_work(struct callback_head *work)
+static void task_numa_work(struct callback_head *work)
 {
 	unsigned long migrate, next_scan, now = jiffies;
 	struct task_struct *p = current;