--- a/road_cmd.c	Wed Jul 20 22:02:58 2005 +0000
+++ b/road_cmd.c	Wed Jul 20 22:05:13 2005 +0000
@@ -874,7 +874,7 @@
 			if (image & 0x8000)
 				image |= ormod;
 			if (_display_opt & DO_TRANS_BUILDINGS) // show transparent depots
-				image = (image & 0x3FFF) | 0x3224000;
+				MAKE_TRANSPARENT(image);
 
 			AddSortableSpriteToDraw(image, ti->x | drss->subcoord_x,
 				ti->y | drss->subcoord_y, drss->width, drss->height, 0x14, ti->z);