diff --git a/block/blk-wbt.c b/block/blk-wbt.c
index 919444d75489..9f142b84dc85 100644
--- a/block/blk-wbt.c
+++ b/block/blk-wbt.c
@@ -754,6 +754,7 @@ void wbt_disable_default(struct request_queue *q)
 	if (rwb->enable_state == WBT_STATE_ON_DEFAULT)
 		rwb->wb_normal = 0;
 }
+EXPORT_SYMBOL_GPL(wbt_disable_default);
 
 static struct rq_qos_ops wbt_rqos_ops = {
 	.throttle = wbt_wait,