--- a/ai_old.c	Thu Jul 21 18:01:43 2005 +0000
+++ b/ai_old.c	Thu Jul 21 18:44:27 2005 +0000
@@ -13,6 +13,7 @@
 #include "economy.h"
 #include "airport.h"
 #include "depot.h"
+#include "variables.h"
 
 // remove some day perhaps?
 static Player *_cur_ai_player;