diff --git a/fs/btrfs/reada.c b/fs/btrfs/reada.c
index c705a48..96b93da 100644
--- a/fs/btrfs/reada.c
+++ b/fs/btrfs/reada.c
@@ -359,7 +359,8 @@
 	 * map block
 	 */
 	length = blocksize;
-	ret = btrfs_map_block(fs_info, REQ_WRITE, logical, &length, &bbio, 0);
+	ret = btrfs_map_block(fs_info, REQ_GET_READ_MIRRORS, logical, &length,
+			      &bbio, 0);
 	if (ret || !bbio || length < blocksize)
 		goto error;