--- a/src/ai/api/ai_road.cpp	Thu Apr 24 23:29:01 2008 +0000
+++ b/src/ai/api/ai_road.cpp	Thu Apr 24 23:39:18 2008 +0000
@@ -3,6 +3,7 @@
 /** @file ai_road.cpp Implementation of AIRoad. */
 
 #include "ai_road.hpp"
+#include "../../openttd.h"
 #include "../../road_map.h"
 #include "../../station_map.h"