diff --git a/include/boost/none.hpp b/include/boost/none.hpp
index bd342da..e9fc062 100644
--- a/include/boost/none.hpp
+++ b/include/boost/none.hpp
@@ -20,7 +20,7 @@
 
 namespace boost {
 
-none_t const none = ((none_t)0) ;
+none_t const none = (static_cast<none_t>(0)) ;
 
 } // namespace boost