if (IsSavegameVersionBefore(195)) {

        for (TileIndex t = 0; t < map_size; t++) {

            if ((IsTileType(t, MP_STATION) || IsTileType(t, MP_WATER) || IsTileType(t, MP_OBJECT)) && GetWaterClass(t) == WATER_CLASS_CANAL) {

                assert(IsValidTile(t));

                assert(!IsTileType(t, MP_HOUSE));

                assert(!IsTileType(t, MP_INDUSTRY));

                Owner old = (Owner)GB(_m[t].m1, 0, 5);

                if (old = OWNER_NONE) SB(_m[t].m1, 0, 4, OWNER_TOWN);

                if (old = OWNER_WATER) SB(_m[t].m1, 0, 4, OWNER_TOWN);

            }

        }

    }