diff --git a/include/boost/bind/placeholders.hpp b/include/boost/bind/placeholders.hpp
index e8c9694..c902e0c 100644
--- a/include/boost/bind/placeholders.hpp
+++ b/include/boost/bind/placeholders.hpp
@@ -19,20 +19,31 @@
 //
 
 #include <boost/bind/arg.hpp>
+#include <boost/config.hpp>
+
+// With MSVC precompiled headers, unnamed namespaces are not unique
+
+#ifdef BOOST_MSVC
+# define BOOST_BIND_STATIC static
+#else
+# define BOOST_BIND_STATIC
+#endif
 
 namespace
 {
 
-boost::arg<1> _1;
-boost::arg<2> _2;
-boost::arg<3> _3;
-boost::arg<4> _4;
-boost::arg<5> _5;
-boost::arg<6> _6;
-boost::arg<7> _7;
-boost::arg<8> _8;
-boost::arg<9> _9;
+BOOST_BIND_STATIC boost::arg<1> _1;
+BOOST_BIND_STATIC boost::arg<2> _2;
+BOOST_BIND_STATIC boost::arg<3> _3;
+BOOST_BIND_STATIC boost::arg<4> _4;
+BOOST_BIND_STATIC boost::arg<5> _5;
+BOOST_BIND_STATIC boost::arg<6> _6;
+BOOST_BIND_STATIC boost::arg<7> _7;
+BOOST_BIND_STATIC boost::arg<8> _8;
+BOOST_BIND_STATIC boost::arg<9> _9;
 
 } // unnamed namespace
 
+#undef BOOST_BIND_STATIC
+
 #endif // #ifndef BOOST_BIND_PLACEHOLDERS_HPP_INCLUDED