diff --git a/block/blk-throttle.c b/block/blk-throttle.c
index 033745cd7fba..680a0cc116dd 100644
--- a/block/blk-throttle.c
+++ b/block/blk-throttle.c
@@ -1258,7 +1258,7 @@ out_unlock:
  * of throtl_data->service_queue.  Those bio's are ready and issued by this
  * function.
  */
-void blk_throtl_dispatch_work_fn(struct work_struct *work)
+static void blk_throtl_dispatch_work_fn(struct work_struct *work)
 {
 	struct throtl_data *td = container_of(work, struct throtl_data,
 					      dispatch_work);