client.go | 10 ++++++++--

diff --git a/client.go b/client.go
index cddb442f305b0303a627bc6723be6f363e695879..7b3a8967513fddae41f0894bb7769e5347fe4e9e 100644
--- a/client.go
+++ b/client.go
@@ -920,8 +920,14 @@ 	}
 }
 
 func (me *Client) peerGotPiece(t *torrent, c *connection, piece int) {
-	for piece >= len(c.PeerPieces) {
-		c.PeerPieces = append(c.PeerPieces, false)
+	if t.haveInfo() {
+		if c.PeerPieces == nil {
+			c.PeerPieces = make([]bool, t.NumPieces())
+		}
+	} else {
+		for piece >= len(c.PeerPieces) {
+			c.PeerPieces = append(c.PeerPieces, false)
+		}
 	}
 	c.PeerPieces[piece] = true
 	if t.wantPiece(piece) {