diff --git a/include/linux/pm.h b/include/linux/pm.h
index 4c441be03079..c1d21e9a864f 100644
--- a/include/linux/pm.h
+++ b/include/linux/pm.h
@@ -598,7 +598,7 @@ struct dev_pm_info {
 #endif
 #ifdef CONFIG_PM
 	struct hrtimer		suspend_timer;
-	unsigned long		timer_expires;
+	u64			timer_expires;
 	struct work_struct	work;
 	wait_queue_head_t	wait_queue;
 	struct wake_irq		*wakeirq;