diff --git a/Tun/Punchnet/SDLUDPHole.swift b/Tun/Punchnet/SDLUDPHole.swift
index 58debb3..de88c71 100644
--- a/Tun/Punchnet/SDLUDPHole.swift
+++ b/Tun/Punchnet/SDLUDPHole.swift
@@ -98,7 +98,7 @@ final class SDLUDPHole: ChannelInboundHandler {
     
     // MARK: 处理写入逻辑
     func send(type: SDLPacketType, data: Data, remoteAddress: SocketAddress) {
-        guard let channel = self.channel else {
+        guard let channel = self.channel, !self.isStopped else {
             return
         }