Index: boost/serialization/export.hpp
===================================================================
--- boost/serialization/export.hpp	(revision 50600)
+++ boost/serialization/export.hpp	(working copy)
@@ -146,22 +146,25 @@
     }
 };
 
-template<typename T>
-class init_guid {
-    static ::boost::archive::detail::guid_initializer<T> const
-        & guid_initializer;
-};
-
 } // namespace detail
 } // namespace archive
 } // namespace boost
 
 #define BOOST_CLASS_EXPORT_GUID(T, K)                                               \
+    namespace boost_archive_export_initializer_impl {                               \
+    template<typename T0>                                                           \
+    struct init_guid;                                                               \
+    template<>                                                                      \
+    struct init_guid< T > {                                                         \
+        static ::boost::archive::detail::guid_initializer< T > const                \
+            & guid_initializer;                                                     \
+    };                                                                              \
     ::boost::archive::detail::guid_initializer< T > const &                         \
-        ::boost::archive::detail::init_guid<T>::guid_initializer =                  \
+        init_guid< T >::guid_initializer =                                          \
            ::boost::serialization::singleton<                                       \
                ::boost::archive::detail::guid_initializer< T >                      \
            >::get_mutable_instance().export_guid(K);                                \
+    }
 
 #if BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3205))