diff -r 46d69162ec97 boost/random/mersenne_twister.hpp
--- a/boost/random/mersenne_twister.hpp	Sun Aug 24 21:44:30 2008 -0400
+++ b/boost/random/mersenne_twister.hpp	Wed Oct 29 10:14:10 2008 -0400
@@ -27,6 +27,10 @@
 #include <boost/random/linear_congruential.hpp>
 #include <boost/detail/workaround.hpp>
 #include <boost/random/detail/ptr_helper.hpp>
+#ifdef BOOST_SERIALIZE_TWISTER
+#include <boost/serialization/collection_size_type.hpp>
+#include <boost/serialization/nvp.hpp>
+#endif	// BOOST_SERIALIZE_TWISTER
 
 namespace boost {
 namespace random {
@@ -152,7 +156,20 @@
     mt.i = mt.state_size;
     return is;
   }
+
 #endif
+
+#ifdef BOOST_SERIALIZE_TWISTER
+  friend class boost::serialization::access;
+
+  // Serialization
+  template<class Archive>
+  void serialize(Archive & ar, const unsigned int /* file_version */){
+    ar & serialization::make_nvp ("i", i);
+    ar & serialization::make_nvp ("x", x);
+  }
+
+#endif	// BOOST_SERIALIZE_TWISTER
 
   friend bool operator==(const mersenne_twister& x, const mersenne_twister& y)
   {