diff -r 6c003b73a276 -r 7816f447a0ed src/ai/api/ai_tile.cpp
--- a/src/ai/api/ai_tile.cpp	Sat Jun 07 16:01:47 2008 +0000
+++ b/src/ai/api/ai_tile.cpp	Sat Jun 07 16:05:03 2008 +0000
@@ -4,6 +4,7 @@
 
 #include "ai_tile.hpp"
 #include "ai_map.hpp"
+#include "ai_town.hpp"
 #include "../../openttd.h"
 #include "../../tile_map.h"
 #include "../../map_func.h"
@@ -150,3 +151,8 @@
 
 	return AIObject::DoCommand(tile, 0, 0, CMD_LANDSCAPE_CLEAR);
 }
+
+/* static */ bool AITile::IsWithinTownInfluence(TileIndex tile, TownID town_id)
+{
+	return AITown::IsWithinTownInfluence(town_id, tile);
+}