diff --git a/block/block-backend.c b/block/block-backend.c
index 45d9101be3..18e543780d 100644
--- a/block/block-backend.c
+++ b/block/block-backend.c
@@ -655,12 +655,16 @@ BlockBackend *blk_by_public(BlockBackendPublic *public)
  */
 void blk_remove_bs(BlockBackend *blk)
 {
+    BlockDriverState *bs;
     ThrottleTimers *tt;
 
     notifier_list_notify(&blk->remove_bs_notifiers, blk);
     if (blk->public.throttle_group_member.throttle_state) {
         tt = &blk->public.throttle_group_member.throttle_timers;
+        bs = blk_bs(blk);
+        bdrv_drained_begin(bs);
         throttle_timers_detach_aio_context(tt);
+        bdrv_drained_end(bs);
     }
 
     blk_update_root_state(blk);