diff --git a/include/boost/fusion/support/pair.hpp b/include/boost/fusion/support/pair.hpp
index a4cd1ff..a6c58a9 100644
--- a/include/boost/fusion/support/pair.hpp
+++ b/include/boost/fusion/support/pair.hpp
@@ -29,8 +29,11 @@ namespace boost { namespace fusion
     template <typename First, typename Second>
     struct pair
     {
+        template< typename B = typename std::is_default_constructible<Second>
+                , typename boost::enable_if<B>::type* = 0
+                >
         BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED
-        pair()
+        pair( )
             : second() {}
 
         BOOST_CONSTEXPR BOOST_FUSION_GPU_ENABLED