diff --git a/go-gost/x/internal/net/udp/listener.go b/go-gost/x/internal/net/udp/listener.go
index b7c34f4..fac064e 100644
--- a/go-gost/x/internal/net/udp/listener.go
+++ b/go-gost/x/internal/net/udp/listener.go
@@ -227,6 +227,7 @@ func (c *conn) SetIdle(idle bool) {
 func (c *conn) WriteQueue(b []byte) error {
 	select {
 	case c.rc <- b:
+		c.SetIdle(false)
 		return nil
 
 	case <-c.closed: