Index: boost/smart_ptr/weak_ptr.hpp
===================================================================
--- boost/smart_ptr/weak_ptr.hpp	(revision 42330)
+++ boost/smart_ptr/weak_ptr.hpp	(working copy)
@@ -17,7 +17,7 @@
 #include <boost/smart_ptr/detail/shared_count.hpp>
 #include <boost/smart_ptr/shared_ptr.hpp>
 
-#ifdef BOOST_MSVC  // moved here to work around VC++ compiler crash
+#if BOOST_WORKAROUND(BOOST_MSVC, < 1600)   // moved here to work around VC++ compiler crash
 # pragma warning(push)
 # pragma warning(disable:4284) // odd return type for operator->
 #endif