diff -r ffde1325bab8 -r 1cefa03f0d5e rail_cmd.c
--- a/rail_cmd.c	Fri Mar 17 08:06:56 2006 +0000
+++ b/rail_cmd.c	Fri Mar 17 10:10:31 2006 +0000
@@ -317,7 +317,7 @@
 			}
 			if (m5 & RAIL_TYPE_SPECIAL ||
 					!IsTileOwner(tile, _current_player) ||
-					GB(_m[tile].m3, 0, 4) != p1) {
+					GetRailType(tile) != p1) {
 				// Get detailed error message
 				return DoCommandByTile(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
 			}
@@ -944,7 +944,7 @@
 
 	// change type.
 	if (exec) {
-		SB(_m[tile].m3, 0, 4, totype);
+		SetRailType(tile, totype);
 		MarkTileDirtyByTile(tile);
 	}