1 files changed, 1 insertions, 0 deletions
diff --git a/tree.h b/tree.h
index 7b045f1a..072bc6df 100644
--- a/tree.h
+++ b/tree.h
@@ -57,4 +57,5 @@ val tree_reset_at(val iter, val tree, val lowkey);
 val tree_next(val iter);
 val tree_peek(val iter);
 val tree_clear(val tree);
+val sub_tree(val tree, val from, val to);
 void tree_init(void);