diff --git a/src/frontends/lean/elaborator.h b/src/frontends/lean/elaborator.h
new file mode 100644
index 000000000..32623456c
--- /dev/null
+++ b/src/frontends/lean/elaborator.h
@@ -0,0 +1,19 @@
+/*
+Copyright (c) 2014 Microsoft Corporation. All rights reserved.
+Released under Apache 2.0 license as described in the file LICENSE.
+
+Author: Leonardo de Moura
+*/
+#pragma once
+#include <utility>
+#include "util/list.h"
+#include "kernel/environment.h"
+#include "kernel/metavar.h"
+#include "library/io_state.h"
+
+namespace lean {
+expr elaborate(environment const & env, io_state const & ios, expr const & e, name_generator const & ngen,
+               substitution const & s = substitution(), list<parameter> const & ctx = list<parameter>());
+expr elaborate(environment const & env, io_state const & ios, expr const & e);
+std::pair<expr, expr> elaborate(environment const & env, io_state const & ios, name const & n, expr const & t, expr const & v);
+}