diff --git a/block/blk.h b/block/blk.h
index 98f4dfd4ec75..980eef1f5690 100644
--- a/block/blk.h
+++ b/block/blk.h
@@ -380,7 +380,7 @@ static inline bool bio_may_need_split(struct bio *bio,
 		return true;
 
 	bv = __bvec_iter_bvec(bio->bi_io_vec, bio->bi_iter);
-	if (bio->bi_iter.bi_size > bv->bv_len)
+	if (bio->bi_iter.bi_size > bv->bv_len - bio->bi_iter.bi_bvec_done)
 		return true;
 	return bv->bv_len + bv->bv_offset > lim->max_fast_segment_size;
 }