Index: iostreams/detail/config/dyn_link.hpp
===================================================================
--- iostreams/detail/config/dyn_link.hpp	(revision 73300)
+++ iostreams/detail/config/dyn_link.hpp	(working copy)
@@ -20,15 +20,13 @@
 
 //------------------Enable dynamic linking on windows-------------------------// 
 
-#ifdef BOOST_HAS_DECLSPEC 
-# if defined(BOOST_ALL_DYN_LINK) || defined(BOOST_IOSTREAMS_DYN_LINK)
-#  ifdef BOOST_IOSTREAMS_SOURCE
-#   define BOOST_IOSTREAMS_DECL __declspec(dllexport)
-#  else
-#   define BOOST_IOSTREAMS_DECL __declspec(dllimport)
-#  endif  
+#if defined(BOOST_ALL_DYN_LINK) || defined(BOOST_IOSTREAMS_DYN_LINK)
+# ifdef BOOST_IOSTREAMS_SOURCE
+#  define BOOST_IOSTREAMS_DECL BOOST_SYMBOL_EXPORT
+# else
+#  define BOOST_IOSTREAMS_DECL BOOST_SYMBOL_IMPORT
 # endif  
-#endif 
+#endif  
 
 #ifndef BOOST_IOSTREAMS_DECL
 # define BOOST_IOSTREAMS_DECL