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diff --git a/src/boost/libs/hana/example/optional/make.cpp b/src/boost/libs/hana/example/optional/make.cpp
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+++ b/src/boost/libs/hana/example/optional/make.cpp
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+// Copyright Louis Dionne 2013-2017
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
+
+#include <boost/hana/assert.hpp>
+#include <boost/hana/core/make.hpp>
+#include <boost/hana/equal.hpp>
+#include <boost/hana/optional.hpp>
+namespace hana = boost::hana;
+
+
+int main() {
+    constexpr auto x = hana::make<hana::optional_tag>();
+    BOOST_HANA_CONSTANT_CHECK(x == hana::make_optional());
+    BOOST_HANA_CONSTANT_CHECK(hana::is_nothing(x));
+
+    constexpr auto just_x = hana::make<hana::optional_tag>('x');
+    static_assert(just_x == hana::make_optional('x'), "");
+    BOOST_HANA_CONSTANT_CHECK(hana::is_just(just_x));
+}