diff --git a/include/boost/mpi/detail/mpi_datatype_oarchive.hpp b/include/boost/mpi/detail/mpi_datatype_oarchive.hpp
index ef6ff40..7079f21 100644
--- a/include/boost/mpi/detail/mpi_datatype_oarchive.hpp
+++ b/include/boost/mpi/detail/mpi_datatype_oarchive.hpp
@@ -18,6 +18,7 @@
 #include <boost/mpi/detail/mpi_datatype_primitive.hpp>
 #include <boost/mpi/datatype_fwd.hpp>
 #include <boost/mpl/assert.hpp>
+#include <boost/static_assert.hpp>
 #include <boost/integer.hpp>
 #include <boost/archive/detail/register_archive.hpp>
 
@@ -61,7 +62,7 @@ public:
     {
       // select the right sized integer for the enum
       typedef typename boost::uint_t<8*sizeof(T)>::least int_type;
-      BOOST_MPL_ASSERT((sizeof(T)==sizeof(int_type)));
+      BOOST_STATIC_ASSERT((sizeof(T)==sizeof(int_type)));
       this->save(*reinterpret_cast<int_type const*>(&t));
     }