diff --git a/include/trace/events/workqueue.h b/include/trace/events/workqueue.h
index 2f057a494d93180dd0e3543b8c43ff7c4de5f629..9a761bc6a251a45358ef6d1a1b7ae3e678333561 100644
--- a/include/trace/events/workqueue.h
+++ b/include/trace/events/workqueue.h
@@ -25,6 +25,8 @@ DECLARE_EVENT_CLASS(workqueue_work,
 	TP_printk("work struct %p", __entry->work)
 );
 
+struct pool_workqueue;
+
 /**
  * workqueue_queue_work - called when a work gets queued
  * @req_cpu:	the requested cpu