diff --git a/test/msgpack_test.cpp b/test/msgpack_test.cpp
index 37bfa46d..fb35c683 100644
--- a/test/msgpack_test.cpp
+++ b/test/msgpack_test.cpp
@@ -843,9 +843,11 @@ public:
   TestEnumType t2;
   TestEnumType t3;
 
-  MSGPACK_DEFINE((int&)t1, (int&)t2, (int&)t3);
+  MSGPACK_DEFINE(t1, t2, t3);
 };
 
+MSGPACK_ADD_ENUM(TestEnumMemberClass::TestEnumType);
+
 TEST(MSGPACK_USER_DEFINED, simple_buffer_enum_member)
 {
   TestEnumMemberClass val1;