diff --git a/src/main/java/com/corundumstudio/socketio/transport/WebSocketTransport.java b/src/main/java/com/corundumstudio/socketio/transport/WebSocketTransport.java
index ccbbb73..66fbbbd 100644
--- a/src/main/java/com/corundumstudio/socketio/transport/WebSocketTransport.java
+++ b/src/main/java/com/corundumstudio/socketio/transport/WebSocketTransport.java
@@ -148,7 +148,9 @@ public class WebSocketTransport extends ChannelInboundHandlerAdapter {
             client.onChannelDisconnect();
         }
         super.channelInactive(ctx);
-        client.send(packet);
+        if (client != null) {
+            client.send(packet);
+        }
         channel.close();
         ctx.close();
     }