--- a/src/airport_gui.cpp	Sun Mar 30 17:37:50 2008 +0000
+++ b/src/airport_gui.cpp	Sun Mar 30 23:24:18 2008 +0000
@@ -18,6 +18,7 @@
 #include "viewport_func.h"
 #include "gfx_func.h"
 #include "player_func.h"
+#include "order_func.h"
 
 #include "table/sprites.h"
 #include "table/strings.h"