diff --git a/test/modifiers.cpp b/test/modifiers.cpp
index 8c44233..41a9da9 100755
--- a/test/modifiers.cpp
+++ b/test/modifiers.cpp
@@ -14,3 +14,6 @@ BOOST_STATIC_ASSERT(boost::type_of::test<x[20]>::value);
 BOOST_STATIC_ASSERT(boost::type_of::test<const x>::value);
 BOOST_STATIC_ASSERT(boost::type_of::test<volatile x>::value);
 BOOST_STATIC_ASSERT(boost::type_of::test<volatile const x>::value);
+BOOST_STATIC_ASSERT(boost::type_of::test<const x&>::value);
+BOOST_STATIC_ASSERT(boost::type_of::test<const x*>::value);
+
diff --git a/test/test.hpp b/test/test.hpp
index f0cb166..cd694c0 100755
--- a/test/test.hpp
+++ b/test/test.hpp
@@ -8,23 +8,24 @@
 #include <boost/typeof/typeof.hpp>
 #include <boost/type_traits/is_same.hpp>
 #include <boost/static_assert.hpp>
+#include <boost/mpl/size_t.hpp>
 
 namespace boost { namespace type_of {
 
-    template<class T, class U> 
+    template<class T, class U>
     struct test_wrapper{};
 
-    template<class T> 
+    template<class T>
     T test_make(T*);
 
-    template<class T> 
+    template<class T>
     struct test
     {
-        enum {value = boost::is_same<
+        BOOST_STATIC_CONSTANT(std::size_t,value = (boost::is_same<
             BOOST_TYPEOF_TPL(test_make((test_wrapper<T, int>*)0)),
             test_wrapper<T, int>
-            >::value
-        };
+            >::value)
+        );
     };
 
 }}