--- a/rail_cmd.c	Sat Apr 09 06:19:08 2005 +0000
+++ b/rail_cmd.c	Sat Apr 09 06:20:03 2005 +0000
@@ -374,7 +374,7 @@
 			cost += ret;
 
 			ret = DoCommandByTile(tile, 0, 0, flags, CMD_LANDSCAPE_CLEAR);
-			if (ret & CMD_ERROR) return ret;
+			if (ret == CMD_ERROR) return ret;
 			cost += ret;
 
 			if (flags & DC_EXEC) {