-typedef boost::mt19937 engine_type;
-typedef boost::gamma_distribution<> gamma_dist;
-typedef boost::uniform_01<engine_type> uniform01;
-typedef boost::variate_generator<engine_type&, gamma_dist> gamma_generator;
+typedef boost::random::mt19937 engine_type;
+typedef boost::random::uniform_01<> uniform_01_dist;
+typedef boost::random::gamma_distribution<> gamma_dist;
+typedef boost::random::variate_generator<engine_type&, uniform_01_dist> uniform_01_generator;
+typedef boost::random::variate_generator<engine_type&, gamma_dist> gamma_generator;