diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index 48e8bb546780bff15e6c01505263b63c32ebc503..ed806649a473f4557792f6c2df182c303207b4c7 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -300,9 +300,6 @@ struct btrfs_bio_stripe {
 	u64 length; /* only used for discard mappings */
 };
 
-struct btrfs_bio;
-typedef void (btrfs_bio_end_io_t) (struct btrfs_bio *bio, int err);
-
 struct btrfs_bio {
 	refcount_t refs;
 	atomic_t stripes_pending;