diff --git a/src/newgrf_industrytiles.cpp b/src/newgrf_industrytiles.cpp --- a/src/newgrf_industrytiles.cpp +++ b/src/newgrf_industrytiles.cpp @@ -248,7 +248,7 @@ bool DrawNewIndustryTile(TileInfo *ti, I if (HasBit(inds->callback_mask, CBM_INDT_DRAW_FOUNDATIONS)) { /* Called to determine the type (if any) of foundation to draw for industry tile */ uint32 callback_res = GetIndustryTileCallback(CBID_INDTILE_DRAW_FOUNDATIONS, 0, 0, gfx, i, ti->tile); - draw_old_one = (callback_res != 0); + if (callback_res != CALLBACK_FAILED) draw_old_one = ConvertBooleanCallback(inds->grf_prop.grffile, CBID_INDTILE_DRAW_FOUNDATIONS, callback_res); } if (draw_old_one) DrawFoundation(ti, FOUNDATION_LEVELED);