diff --git a/transport/internet/udp/dispatcher.go b/transport/internet/udp/dispatcher.go
index b695d6a5..c02e4abf 100644
--- a/transport/internet/udp/dispatcher.go
+++ b/transport/internet/udp/dispatcher.go
@@ -24,7 +24,6 @@ type connEntry struct {
 	link   *transport.Link
 	timer  signal.ActivityUpdater
 	cancel context.CancelFunc
-	closed bool
 }
 
 type Dispatcher struct {