diff --git a/town.h b/town.h
--- a/town.h
+++ b/town.h
@@ -127,7 +127,7 @@ enum {
 	RATING_BRIBE_DOWN_TO = -50 					// XXX SHOULD BE SOMETHING LOWER?
 };
 
-bool CheckforTownRating(uint tile, uint32 flags, Town *t, byte type);
+bool CheckforTownRating(TileIndex tile, uint32 flags, Town *t, byte type);
 
 VARDEF uint16 *_town_sort;