Index: boost/property_tree/detail/rapidxml.hpp
===================================================================
--- boost/property_tree/detail/rapidxml.hpp	(revision 69681)
+++ boost/property_tree/detail/rapidxml.hpp	(working copy)
@@ -16,6 +16,9 @@
 #include <cstdlib>      // For std::size_t
 #include <new>          // For placement new
 
+#include <boost/config.hpp>         // For BOOST_DEDUCED_TYPENAME
+#include <boost/mpl/identity.hpp>
+
 // On MSVC, disable "conditional expression is constant" warning (level 4). 
 // This warning is almost impossible to avoid with certain types of templated code
 #ifdef _MSC_VER
@@ -369,7 +372,8 @@
     public:
 
         //! \cond internal
-        typedef void *(alloc_func)(std::size_t);       // Type of user-defined function used to allocate memory
+        typedef BOOST_DEDUCED_TYPENAME mpl::identity<void *>::type (alloc_func)(std::size_t);
+                                                       // Type of user-defined function used to allocate memory
         typedef void (free_func)(void *);              // Type of user-defined function used to free memory
         //! \endcond