--- a/src/vehicle.h	Wed May 09 20:50:11 2007 +0000
+++ b/src/vehicle.h	Thu May 10 06:42:43 2007 +0000
@@ -141,6 +141,9 @@
 
 	/* Link between the two ends of a multiheaded engine */
 	Vehicle *other_multiheaded_part;
+
+	/* Cached wagon override spritegroup */
+	const struct SpriteGroup *cached_override;
 };
 
 enum {