diff --git a/doc/declval.qbk b/doc/declval.qbk
index 67e82d2..10080aa 100644
--- a/doc/declval.qbk
+++ b/doc/declval.qbk
@@ -14,7 +14,7 @@
     [authors [Botet Escriba, Vicente J.]]
     [copyright 2008 Howard Hinnant]
     [copyright 2008 Beman Dawes]
-    [copyright 2009-2010 Vicente J. Botet Escriba]
+    [copyright 2009-2012 Vicente J. Botet Escriba]
     [license
         Distributed under the Boost Software License, Version 1.0.
         (See accompanying file LICENSE_1_0.txt or copy at
@@ -100,5 +100,16 @@ Declares a function template convert which only participats in overloading if th
 
 [endsect]
 
+[/===============]
+[section History]
+[/===============]
 
+[heading boost 1.50]
+
+Fixes:
+
+* [@http://svn.boost.org/trac/boost/ticket/6570 #6570] Adding noexcept to boost::declval.
+ 	
+
+[endsect]
 
diff --git a/doc/html/declval.html b/doc/html/declval.html
index a2c5a01..dff3a83 100644
--- a/doc/html/declval.html
+++ b/doc/html/declval.html
@@ -3,7 +3,7 @@
 <meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
 <title>Declval</title>
 <link rel="stylesheet" href="../../../../doc/src/boostbook.css" type="text/css">
-<meta name="generator" content="DocBook XSL Stylesheets V1.74.0">
+<meta name="generator" content="DocBook XSL Stylesheets V1.76.0">
 <link rel="home" href="declval.html" title="Declval">
 </head>
 <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
@@ -17,7 +17,7 @@
 </tr></table>
 <hr>
 <div class="spirit-nav"></div>
-<div class="article" lang="en">
+<div class="article">
 <div class="titlepage">
 <div>
 <div><h2 class="title">
@@ -35,9 +35,9 @@
 </div></div>
 <div><p class="copyright">Copyright &#169; 2008 Howard Hinnant</p></div>
 <div><p class="copyright">Copyright &#169; 2008 Beman Dawes</p></div>
-<div><p class="copyright">Copyright &#169; 2009 -2010 Vicente J. Botet Escriba</p></div>
+<div><p class="copyright">Copyright &#169; 2009 -2012 Vicente J. Botet Escriba</p></div>
 <div><div class="legalnotice">
-<a name="id879409"></a><p>
+<a name="idp13448880"></a><p>
         Distributed under the Boost Software License, Version 1.0. (See accompanying
         file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
       </p>
@@ -49,10 +49,11 @@
 <p><b>Table of Contents</b></p>
 <dl>
 <dt><span class="section"><a href="declval.html#declval.overview">Overview</a></span></dt>
-<dt><span class="section"><a href="declval.html#declval.reference"> Reference </a></span></dt>
+<dt><span class="section"><a href="declval.html#declval.reference">Reference </a></span></dt>
+<dt><span class="section"><a href="declval.html#declval.history">History</a></span></dt>
 </dl>
 </div>
-<div class="section" lang="en">
+<div class="section">
 <div class="titlepage"><div><div><h2 class="title" style="clear: both">
 <a name="declval.overview"></a><a class="link" href="declval.html#declval.overview" title="Overview">Overview</a>
 </h2></div></div></div>
@@ -112,9 +113,9 @@
       function is expected to be part of the daily tool-box of the C++0x programmer.
     </p>
 </div>
-<div class="section" lang="en">
+<div class="section">
 <div class="titlepage"><div><div><h2 class="title" style="clear: both">
-<a name="declval.reference"></a><a class="link" href="declval.html#declval.reference" title="Reference"> Reference </a>
+<a name="declval.reference"></a><a class="link" href="declval.html#declval.reference" title="Reference">Reference </a>
 </h2></div></div></div>
 <p>
       <code class="computeroutput"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">utility</span><span class="special">/</span><span class="identifier">declval</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
@@ -152,9 +153,25 @@
       if the type From can be explicitly converted to type To.
     </p>
 </div>
+<div class="section">
+<div class="titlepage"><div><div><h2 class="title" style="clear: both">
+<a name="declval.history"></a><a class="link" href="declval.html#declval.history" title="History">History</a>
+</h2></div></div></div>
+<a name="declval.history.boost_1_50"></a><h4>
+<a name="idp13551456"></a>
+      <a class="link" href="declval.html#declval.history.boost_1_50">boost 1.50</a>
+    </h4>
+<p>
+      Fixes:
+    </p>
+<div class="itemizedlist"><ul class="itemizedlist" type="disc"><li class="listitem">
+          <a href="http://svn.boost.org/trac/boost/ticket/6570" target="_top">#6570</a>
+          Adding noexcept to boost::declval.
+        </li></ul></div>
+</div>
 </div>
 <table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
-<td align="left"><p><small>Last revised: September 16, 2010 at 16:19:10 GMT</small></p></td>
+<td align="left"><p><small>Last revised: April 01, 2012 at 20:13:37 GMT</small></p></td>
 <td align="right"><div class="copyright-footer"></div></td>
 </tr></table>
 <hr>
diff --git a/include/boost/utility/declval.hpp b/include/boost/utility/declval.hpp
index 41ec3dc..d74610c 100644
--- a/include/boost/utility/declval.hpp
+++ b/include/boost/utility/declval.hpp
@@ -13,6 +13,7 @@
 //----------------------------------------------------------------------------//
 
 #include <boost/type_traits/add_rvalue_reference.hpp>
+//#include <boost/type_traits/add_lvalue_reference.hpp>
 
 //----------------------------------------------------------------------------//
 //                                                                            //
@@ -36,9 +37,13 @@
 
 namespace boost {
 
+//#if !defined(BOOST_NO_RVALUE_REFERENCES)
     template <typename T>
-    typename add_rvalue_reference<T>::type declval(); //noexcept; // as unevaluated operand
-
+    typename add_rvalue_reference<T>::type declval() BOOST_NOEXCEPT; // as unevaluated operand
+//#else
+//    template <typename T>
+//    typename add_lvalue_reference<T>::type declval() BOOST_NOEXCEPT; // as unevaluated operand
+//#endif
 }  // namespace boost
 
 #endif  // BOOST_TYPE_TRAITS_EXT_DECLVAL__HPP
