diff --git a/block/blk-map.c b/block/blk-map.c
index 0760963..c07d9c8 100644
--- a/block/blk-map.c
+++ b/block/blk-map.c
@@ -152,10 +152,10 @@
 	 */
 	if (len & q->dma_pad_mask) {
 		unsigned int pad_len = (q->dma_pad_mask & ~len) + 1;
-		struct bio *bio = rq->biotail;
+		struct bio *tail = rq->biotail;
 
-		bio->bi_io_vec[bio->bi_vcnt - 1].bv_len += pad_len;
-		bio->bi_size += pad_len;
+		tail->bi_io_vec[tail->bi_vcnt - 1].bv_len += pad_len;
+		tail->bi_size += pad_len;
 
 		rq->extra_len += pad_len;
 	}