diff --git a/include/upnp/upnp_context.h b/include/upnp/upnp_context.h
index ead135f..9941e3b 100644
--- a/include/upnp/upnp_context.h
+++ b/include/upnp/upnp_context.h
@@ -318,6 +318,7 @@
 
     // Shutdown synchronization
     bool shutdownComplete_ {false};
+    bool shutdownTimedOut_ {false};
 };
 
 } // namespace upnp