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diff --git a/boost/units/systems/si/codata/helion_constants.hpp b/boost/units/systems/si/codata/helion_constants.hpp
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+++ b/boost/units/systems/si/codata/helion_constants.hpp
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+// Boost.Units - A C++ library for zero-overhead dimensional analysis and 
+// unit/quantity manipulation and conversion
+//
+// Copyright (C) 2003-2008 Matthias Christian Schabel
+// Copyright (C) 2008 Steven Watanabe
+//
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+#ifndef BOOST_UNITS_CODATA_HELION_CONSTANTS_HPP
+#define BOOST_UNITS_CODATA_HELION_CONSTANTS_HPP
+
+#include <boost/units/static_constant.hpp>
+
+#include <boost/units/systems/detail/constants.hpp>
+#include <boost/units/systems/si/amount.hpp>
+#include <boost/units/systems/si/area.hpp>
+#include <boost/units/systems/si/electric_charge.hpp>
+#include <boost/units/systems/si/energy.hpp>
+#include <boost/units/systems/si/frequency.hpp>
+#include <boost/units/systems/si/length.hpp>
+#include <boost/units/systems/si/mass.hpp>
+#include <boost/units/systems/si/magnetic_flux_density.hpp>
+#include <boost/units/systems/si/time.hpp>
+#include <boost/units/systems/si/wavenumber.hpp>
+
+#include <boost/units/systems/si/codata/typedefs.hpp>
+
+/// \file
+/// CODATA recommended values of fundamental atomic and nuclear constants
+/// CODATA 2006 values as of 2007/03/30
+
+namespace boost {
+
+namespace units { 
+
+namespace si {
+                            
+namespace constants {
+
+namespace codata {
+
+/// CODATA recommended values of the fundamental physical constants: NIST SP 961
+
+/// helion mass
+BOOST_UNITS_PHYSICAL_CONSTANT(m_h,quantity<mass>,5.00641192e-27*kilograms,2.5e-34*kilograms);
+/// helion-electron mass ratio
+BOOST_UNITS_PHYSICAL_CONSTANT(m_h_over_m_e,quantity<dimensionless>,5495.8852765*dimensionless(),5.2e-6*dimensionless());
+/// helion-proton mass ratio
+BOOST_UNITS_PHYSICAL_CONSTANT(m_h_over_m_p,quantity<dimensionless>,2.9931526713*dimensionless(),2.6e-9*dimensionless());
+/// helion molar mass
+BOOST_UNITS_PHYSICAL_CONSTANT(M_h,quantity<mass_over_amount>,3.0149322473e-3*kilograms/mole,2.6e-12*kilograms/mole);
+/// helion shielded magnetic moment
+BOOST_UNITS_PHYSICAL_CONSTANT(mu_h_prime,quantity<energy_over_magnetic_flux_density>,-1.074552982e-26*joules/tesla,3.0e-34*joules/tesla);
+/// shielded helion-Bohr magneton ratio
+BOOST_UNITS_PHYSICAL_CONSTANT(mu_h_prime_over_mu_B,quantity<dimensionless>,-1.158671471e-3*dimensionless(),1.4e-11*dimensionless());
+/// shielded helion-nuclear magneton ratio
+BOOST_UNITS_PHYSICAL_CONSTANT(mu_h_prime_over_mu_N,quantity<dimensionless>,-2.127497718*dimensionless(),2.5e-8*dimensionless());
+/// shielded helion-proton magnetic moment ratio
+BOOST_UNITS_PHYSICAL_CONSTANT(mu_h_prime_over_mu_p,quantity<dimensionless>,-0.761766558*dimensionless(),1.1e-8*dimensionless());
+/// shielded helion-shielded proton magnetic moment ratio
+BOOST_UNITS_PHYSICAL_CONSTANT(mu_h_prime_over_mu_p_prime,quantity<dimensionless>,-0.7617861313*dimensionless(),3.3e-8*dimensionless());
+/// shielded helion gyromagnetic ratio
+BOOST_UNITS_PHYSICAL_CONSTANT(gamma_h_prime,quantity<frequency_over_magnetic_flux_density>,2.037894730e8/second/tesla,5.6e-0/second/tesla);
+
+} // namespace codata
+
+} // namespace constants    
+
+} // namespace si
+
+} // namespace units
+
+} // namespace boost
+
+#endif // BOOST_UNITS_CODATA_HELION_CONSTANTS_HPP