diff -up ./boost/bind/arg.hpp~ ./boost/bind/arg.hpp

--- ./boost/bind/arg.hpp~	2007-11-25 10:07:19.000000000 -0800

+++ ./boost/bind/arg.hpp	2013-07-18 00:41:41.667412595 -0700

@@ -21,6 +21,7 @@

 #include <boost/config.hpp>

 #include <boost/is_placeholder.hpp>

+#include <boost/static_assert.hpp>

 namespace boost

 {

@@ -33,8 +34,7 @@ template< int I > struct arg

     template< class T > arg( T const & /* t */ )

     {

-        // static assert I == is_placeholder<T>::value

-        typedef char T_must_be_placeholder[ I == is_placeholder<T>::value? 1: -1 ];

+	BOOST_STATIC_ASSERT(I == is_placeholder<T>::value);

     }

 };