diff --git a/src/newgrf_house.cpp b/src/newgrf_house.cpp
--- a/src/newgrf_house.cpp
+++ b/src/newgrf_house.cpp
@@ -346,7 +346,7 @@ static uint32 GetDistanceFromNearbyHouse
 			/* Extract tile offset. */
 			int8 x_offs = GB(GetRegister(0x100), 0, 8);
 			int8 y_offs = GB(GetRegister(0x100), 8, 8);
-			TileIndex testtile = TILE_MASK(this->tile + TileDiffXY(x_offs, y_offs));
+			TileIndex testtile = Map::WrapToMap(this->tile + TileDiffXY(x_offs, y_offs));
 
 			StationFinder stations(TileArea(testtile, 1, 1));
 			const StationList *sl = stations.GetStations();