1 files changed, 2 insertions, 0 deletions
diff --git a/tree.h b/tree.h
index b0a1085..cd8a947 100644
--- a/tree.h
+++ b/tree.h
@@ -16,6 +16,8 @@ typedef struct parse_tree {
 	} attr;
 	int ret_type;
 	struct parse_tree *l, *r;
+
+	int label;
 } ptree;
 
 void aux_tree_print(ptree*, int);