--- a/src/engine_gui.cpp	Tue Apr 29 18:19:29 2008 +0000
+++ b/src/engine_gui.cpp	Tue Apr 29 21:31:29 2008 +0000
@@ -8,6 +8,7 @@
 #include "window_gui.h"
 #include "gfx_func.h"
 #include "engine_func.h"
+#include "engine_base.h"
 #include "command_func.h"
 #include "economy_func.h"
 #include "news_func.h"