diff --git a/block/blk-iocost.c b/block/blk-iocost.c
index 495396425bade019ff8f26564b62d4949903cea9..08036476e6fa25815d40f9f5eed02b6735e4c17f 100644
--- a/block/blk-iocost.c
+++ b/block/blk-iocost.c
@@ -3264,9 +3264,11 @@ static ssize_t ioc_qos_write(struct kernfs_open_file *of, char *input,
 		blk_stat_enable_accounting(disk->queue);
 		blk_queue_flag_set(QUEUE_FLAG_RQ_ALLOC_TIME, disk->queue);
 		ioc->enabled = true;
+		wbt_disable_default(disk->queue);
 	} else {
 		blk_queue_flag_clear(QUEUE_FLAG_RQ_ALLOC_TIME, disk->queue);
 		ioc->enabled = false;
+		wbt_enable_default(disk->queue);
 	}
 
 	if (user) {