connection.go | 3 +++

diff --git a/connection.go b/connection.go
index f986c5cbcd01643948b95b0771ddd1d14994d376..91d5b327451cd8938165bdb0e7633f0edb8e829b 100644
--- a/connection.go
+++ b/connection.go
@@ -104,6 +104,9 @@ func (c *connection) PeerHasPiece(index peer_protocol.Integer) bool {
 	if c.PeerPieces == nil {
 		return false
 	}
+	if int(index) >= len(c.PeerPieces) {
+		return false
+	}
 	return c.PeerPieces[index]
 }