diff --git a/src/map.cpp b/src/map.cpp
--- a/src/map.cpp
+++ b/src/map.cpp
@@ -269,7 +269,7 @@ bool CircularTileSearch(TileIndex *tile,
 
 		/* If tile test is not successful, get one tile up,
 		 * ready for a test in first circle around center tile */
-		*tile = TILE_ADD(*tile, TileOffsByDir(DIR_N));
+		*tile = TileAddByDir(*tile, DIR_N);
 		return CircularTileSearch(tile, size / 2, 1, 1, proc, user_data);
 	} else {
 		return CircularTileSearch(tile, size / 2, 0, 0, proc, user_data);