diff --git a/server/torr/storage/torrstor/cache.go b/server/torr/storage/torrstor/cache.go
index 3074b31..efe861d 100644
--- a/server/torr/storage/torrstor/cache.go
+++ b/server/torr/storage/torrstor/cache.go
@@ -83,7 +83,7 @@ func (c *Cache) Piece(m metainfo.Piece) storage.PieceImpl {
 	if val, ok := c.pieces[m.Index()]; ok {
 		return val
 	}
-	return nil
+	return &PieceFake{}
 }
 
 func (c *Cache) Close() error {
diff --git a/server/torr/storage/torrstor/piecefake.go b/server/torr/storage/torrstor/piecefake.go
new file mode 100644
index 0000000..6434bb2
--- /dev/null
+++ b/server/torr/storage/torrstor/piecefake.go
@@ -0,0 +1,33 @@
+package torrstor
+
+import (
+	"errors"
+	"github.com/anacrolix/torrent/storage"
+)
+
+type PieceFake struct{}
+
+func (PieceFake) ReadAt(p []byte, off int64) (n int, err error) {
+	err = errors.New("fake")
+	return
+}
+
+func (PieceFake) WriteAt(p []byte, off int64) (n int, err error) {
+	err = errors.New("fake")
+	return
+}
+
+func (PieceFake) MarkComplete() error {
+	return errors.New("fake")
+}
+
+func (PieceFake) MarkNotComplete() error {
+	return errors.New("fake")
+}
+
+func (PieceFake) Completion() storage.Completion {
+	return storage.Completion{
+		Complete: false,
+		Ok:       true,
+	}
+}
diff --git a/server/torr/storage/torrstor/storage.go b/server/torr/storage/torrstor/storage.go
index 9fcf069..1c92d0b 100644
--- a/server/torr/storage/torrstor/storage.go
+++ b/server/torr/storage/torrstor/storage.go
@@ -6,7 +6,7 @@ import (
 	"server/torr/storage"
 
 	"github.com/anacrolix/torrent/metainfo"
-	storage2 "github.com/anacrolix/torrent/storage"
+	ts "github.com/anacrolix/torrent/storage"
 )
 
 type Storage struct {
@@ -24,16 +24,20 @@ func NewStorage(capacity int64) *Storage {
 	return stor
 }
 
-func (s *Storage) OpenTorrent(info *metainfo.Info, infoHash metainfo.Hash) (storage2.TorrentImpl, error) {
+func (s *Storage) OpenTorrent(info *metainfo.Info, infoHash metainfo.Hash) (ts.TorrentImpl, error) {
+	capFunc := func() (int64, bool) {
+		return s.capacity, true
+	}
 	s.mu.Lock()
 	defer s.mu.Unlock()
 	ch := NewCache(s.capacity, s)
 	ch.Init(info, infoHash)
 	s.caches[infoHash] = ch
 	//	return ch, nil
-	return storage2.TorrentImpl{
-		Piece: ch.Piece,
-		Close: ch.Close,
+	return ts.TorrentImpl{
+		Piece:    ch.Piece,
+		Close:    ch.Close,
+		Capacity: &capFunc,
 	}, nil
 }