diff --git a/ixwebsocket/IXWebSocket.cpp b/ixwebsocket/IXWebSocket.cpp
index 8ba50eea..d1d57b2e 100644
--- a/ixwebsocket/IXWebSocket.cpp
+++ b/ixwebsocket/IXWebSocket.cpp
@@ -405,6 +405,8 @@ namespace ix
                        bool decompressionError,
                        WebSocketTransport::MessageKind messageKind)
                 {
+                    if (!isConnected()) return;
+                    
                     WebSocketMessageType webSocketMessageType {WebSocketMessageType::Error};
                     switch (messageKind)
                     {