diff --git a/src/window.cpp b/src/window.cpp
index cd75113536..d67c7f2f70 100644
--- a/src/window.cpp
+++ b/src/window.cpp
@@ -3100,11 +3100,13 @@ void UpdateWindows()
 
 	CallWindowRealtimeTickEvent(delta_ms);
 
+#ifdef ENABLE_NETWORKING
 	static GUITimer network_message_timer = GUITimer(1);
 	if (network_message_timer.Elapsed(delta_ms)) {
 		network_message_timer.SetInterval(1000);
 		NetworkChatMessageLoop();
 	}
+#endif
 
 	Window *w;