connection.go | 5 +++--

diff --git a/connection.go b/connection.go
index 289d20a80bd18c6dba13c0bc096a402d468adaaf..6664e01aa57ac0c07a9466b0ed02ca45a3991010 100644
--- a/connection.go
+++ b/connection.go
@@ -944,8 +944,9 @@ 		if !c.t.haveMetadataPiece(index) && !c.requestedMetadataPiece(index) {
 			pending = append(pending, index)
 		}
 	}
-	for _, i := range rand.Perm(len(pending)) {
-		c.requestMetadataPiece(pending[i])
+	rand.Shuffle(len(pending), func(i, j int) { pending[i], pending[j] = pending[j], pending[i] })
+	for _, i := range pending {
+		c.requestMetadataPiece(i)
 	}
 }