diff --git a/include/linux/workqueue.h b/include/linux/workqueue.h
index 426c39c..a3d7556 100644
--- a/include/linux/workqueue.h
+++ b/include/linux/workqueue.h
@@ -109,6 +109,9 @@
 struct delayed_work {
 	struct work_struct work;
 	struct timer_list timer;
+
+	/* target workqueue and CPU ->timer uses to queue ->work */
+	struct workqueue_struct *wq;
 	int cpu;
 };