1 files changed, 1 insertions, 0 deletions
diff --git a/newgrf_spritegroup.h b/newgrf_spritegroup.h
index ad3507a5f..216e2580b 100644
--- a/newgrf_spritegroup.h
+++ b/newgrf_spritegroup.h
@@ -171,6 +171,7 @@ typedef struct ResolverObject {
 		struct {
 			const struct Vehicle *self;
 			const struct Vehicle *parent;
+			EngineID self_type;
 		} vehicle;
 		struct {
 			TileIndex tile;