diff --git a/include/transport/WebSocketClient.h b/include/transport/WebSocketClient.h
index c078900ee02629e05c37075b8b8f19e7578256f6..bdfa7dbc8cccd3f9758ab2e81421336538e43806 100644
--- a/include/transport/WebSocketClient.h
+++ b/include/transport/WebSocketClient.h
@@ -61,6 +61,7 @@ class WebSocketClient {
 		boost::signal<void (const std::string &payload)> onPayloadReceived;
 
 		boost::signal<void ()> onWebSocketConnected;
+		boost::signal<void (const boost::optional<Swift::Connection::Error> &error)> onWebSocketDisconnected;
 
 	private:
 		void handleDNSResult(const std::vector<Swift::HostAddress>&, boost::optional<Swift::DomainNameResolveError>);