storage/piece_resource.go | 6 +++++-

diff --git a/storage/piece_resource.go b/storage/piece_resource.go
index 66d877fbe6c97d4c37dd7a0538e0999eb6ebec83..8df443896668e15459cb09a041cbcc89aed3f0e5 100644
--- a/storage/piece_resource.go
+++ b/storage/piece_resource.go
@@ -191,7 +191,11 @@ 	if err != nil {
 		panic(err)
 	}
 	r := bytes.NewReader(b)
-	err = i.Put(r)
+	if sp, ok := i.(SizedPutter); ok {
+		err = sp.PutSized(r, r.Size())
+	} else {
+		err = i.Put(r)
+	}
 	n = len(b) - r.Len()
 	return
 }