diff --git a/include/oatpp-authkit/ws/Hub.hpp b/include/oatpp-authkit/ws/Hub.hpp
index f867f16..ddfd49c 100644
--- a/include/oatpp-authkit/ws/Hub.hpp
+++ b/include/oatpp-authkit/ws/Hub.hpp
@@ -66,10 +66,12 @@ struct SocketInfo {
  * @endcode
  */
 struct HubHousekeeper; // forward-declare for friend (#439)
+class Listener;        // forward-declare for friend (Listener calls Hub::sharedMapper)
 
 class Hub
     : public oatpp::websocket::ConnectionHandler::SocketInstanceListener {
     friend struct HubHousekeeper;
+    friend class Listener;
 public:
     using WebSocket = oatpp::websocket::WebSocket;