diff --git a/include/boost/fusion/container/generation/ignore.hpp b/include/boost/fusion/container/generation/ignore.hpp
index 15ce15d4..889f17d2 100644
--- a/include/boost/fusion/container/generation/ignore.hpp
+++ b/include/boost/fusion/container/generation/ignore.hpp
@@ -27,7 +27,7 @@ namespace boost { namespace fusion
     }
 
     //  "ignore" allows tuple positions to be ignored when using "tie".
-    BOOST_CONSTEXPR detail::swallow_assign const ignore = detail::swallow_assign();
+    BOOST_CONSTEXPR_OR_CONST detail::swallow_assign ignore = detail::swallow_assign();
 }}
 
 #endif
diff --git a/include/boost/fusion/support/unused.hpp b/include/boost/fusion/support/unused.hpp
index 4bbe24e8..7e2a6eee 100644
--- a/include/boost/fusion/support/unused.hpp
+++ b/include/boost/fusion/support/unused.hpp
@@ -64,7 +64,7 @@ namespace boost { namespace fusion
         }
     };
 
-    BOOST_CONSTEXPR unused_type const unused = unused_type();
+    BOOST_CONSTEXPR_OR_CONST unused_type unused = unused_type();
 
     namespace detail
     {