diff --git a/test/optional_test_convert_assign.cpp b/test/optional_test_convert_assign.cpp
index 2caaa18..518421c 100644
--- a/test/optional_test_convert_assign.cpp
+++ b/test/optional_test_convert_assign.cpp
@@ -33,7 +33,7 @@ template <typename To, typename From>
 void test_convert_assign()
 {
   optional<To> oi;
-  oi = From{};
+  oi = From();
   BOOST_TEST(oi);
 }