diff --git a/app/vpn/CMakeLists_vpn.cmake b/app/vpn/CMakeLists_vpn.cmake
index 253c6a6..555d9f1 100644
--- a/app/vpn/CMakeLists_vpn.cmake
+++ b/app/vpn/CMakeLists_vpn.cmake
@@ -45,6 +45,7 @@ set_target_properties(boringtun PROPERTIES
 set(VPN_SOURCES
     app/vpn/wireguardconfig.cpp
     app/vpn/relayclient.cpp
+    app/vpn/dragonrelaybackend.cpp   # QObject bridge: RelayClient + TunnelManager → QML
 )
 
 if(APPLE)