storage/mmap.go | 5 ++---

diff --git a/storage/mmap.go b/storage/mmap.go
index 53d8680c5a098a77fb29ec7733a2fa6504d69658..f5437eed517265a2f162123f69fd7bcbe895edad 100644
--- a/storage/mmap.go
+++ b/storage/mmap.go
@@ -47,7 +47,7 @@
 type mmapTorrentStorage struct {
 	infoHash metainfo.Hash
 	span     *mmap_span.MMapSpan
-	pc       PieceCompletion
+	pc       PieceCompletionGetSetter
 }
 
 func (ts *mmapTorrentStorage) Piece(p metainfo.Piece) PieceImpl {
@@ -61,12 +61,11 @@ 	}
 }
 
 func (ts *mmapTorrentStorage) Close() error {
-	ts.pc.Close()
 	return ts.span.Close()
 }
 
 type mmapStoragePiece struct {
-	pc PieceCompletion
+	pc PieceCompletionGetSetter
 	p  metainfo.Piece
 	ih metainfo.Hash
 	io.ReaderAt