--- a/station_cmd.c	Fri Nov 17 18:06:40 2006 +0000
+++ b/station_cmd.c	Fri Nov 17 19:31:44 2006 +0000
@@ -1358,6 +1358,9 @@
 
 	if (GetRailType(tile) == totype) return CMD_ERROR;
 
+	// 'hidden' elrails can't be downgraded to normal rail when elrails are disabled
+	if (_patches.disable_elrails && totype == RAILTYPE_RAIL && GetRailType(tile) == RAILTYPE_ELECTRIC) return CMD_ERROR;
+
 	if (exec) {
 		SetRailType(tile, totype);
 		MarkTileDirtyByTile(tile);