--- a/src/aircraft_gui.cpp	Sat May 17 12:48:06 2008 +0000
+++ b/src/aircraft_gui.cpp	Sat May 17 13:01:30 2008 +0000
@@ -13,6 +13,7 @@
 #include "vehicle_func.h"
 #include "gfx_func.h"
 #include "order_func.h"
+#include "window_gui.h"
 
 #include "table/sprites.h"
 #include "table/strings.h"