1 files changed, 3 insertions, 0 deletions
diff --git a/tree.h b/tree.h
index 0f056429..528bae7b 100644
--- a/tree.h
+++ b/tree.h
@@ -34,6 +34,9 @@ val tnodep(val obj);
 val left(val node);
 val right(val node);
 val key(val node);
+val set_left(val node, val nleft);
+val set_right(val node, val nright);
+val set_key(val node, val nkey);
 val copy_tnode(val node);
 val tree(val keys, val key_fn, val less_fn, val equal_fn);
 val treep(val obj);