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);
     }
 };