diff --git a/include/linux/bio.h b/include/linux/bio.h
index 1dd2bc2..ebcd03b 100644
--- a/include/linux/bio.h
+++ b/include/linux/bio.h
@@ -281,6 +281,10 @@
 extern int bio_get_nr_vecs(struct block_device *);
 extern struct bio *bio_map_user(struct request_queue *, struct block_device *,
 				unsigned long, unsigned int, int);
+struct sg_iovec;
+extern struct bio *bio_map_user_iov(struct request_queue *,
+				    struct block_device *,
+				    struct sg_iovec *, int, int);
 extern void bio_unmap_user(struct bio *);
 extern struct bio *bio_map_kern(struct request_queue *, void *, unsigned int,
 				unsigned int);