diff --git a/conn/bind_std.go b/conn/bind_std.go
index e1bcbd1..46df7fd 100644
--- a/conn/bind_std.go
+++ b/conn/bind_std.go
@@ -65,7 +65,7 @@ func NewStdNetBind() Bind {
 				msgs := make([]ipv6.Message, IdealBatchSize)
 				for i := range msgs {
 					msgs[i].Buffers = make(net.Buffers, 1)
-					msgs[i].OOB = make([]byte, stickyControlSize+gsoControlSize)
+					msgs[i].OOB = make([]byte, 0, stickyControlSize+gsoControlSize)
 				}
 				return &msgs
 			},
@@ -200,6 +200,7 @@ again:
 
 func (s *StdNetBind) putMessages(msgs *[]ipv6.Message) {
 	for i := range *msgs {
+		(*msgs)[i].OOB = (*msgs)[i].OOB[:0]
 		(*msgs)[i] = ipv6.Message{Buffers: (*msgs)[i].Buffers, OOB: (*msgs)[i].OOB}
 	}
 	s.msgsPool.Put(msgs)