diff --git a/server/torr/storage/torrstor/diskpiece.go b/server/torr/storage/torrstor/diskpiece.go
index 71bc569..e973eb0 100644
--- a/server/torr/storage/torrstor/diskpiece.go
+++ b/server/torr/storage/torrstor/diskpiece.go
@@ -37,7 +37,9 @@ func (p *DiskPiece) WriteAt(b []byte, off int64) (n int, err error) {
 
 	go p.piece.cache.LoadPiecesOnDisk()
 
-	p.piece.Size += int64(n)
+	if p.piece.Size > p.piece.cache.pieceLength {
+		p.piece.Size = p.piece.cache.pieceLength
+	}
 	p.piece.Accessed = time.Now().Unix()
 	return
 }