--- mapped_file.hpp	Mon Nov 28 20:55:32 2005
+++ D:\_Libs\boost_1_33_1\boost\iostreams\device\mapped_file.hpp	Tue Apr 03 23:10:48 2007
@@ -62,12 +62,22 @@
 
 struct mapped_file_params {
     explicit mapped_file_params()
-        : mode(), offset(0), length(static_cast<std::size_t>(-1)),
+#if BOOST_WORKAROUND(BOOST_MSVC, < 1400) && defined(BOOST_RWSTD_VER)
+        : mode(std::ios_base::openmode(0)),
+#else
+        : mode(),
+#endif
+          offset(0), length(static_cast<std::size_t>(-1)),
           new_file_size(0), hint(0)
         { }
     explicit mapped_file_params(const std::string& path)
-        : path(path), mode(), offset(0),
-          length(static_cast<std::size_t>(-1)),
+        : path(path),
+#if BOOST_WORKAROUND(BOOST_MSVC, < 1400) && defined(BOOST_RWSTD_VER)
+          mode(std::ios_base::openmode(0)),
+#else
+          mode(),
+#endif
+          offset(0), length(static_cast<std::size_t>(-1)),
           new_file_size(0), hint(0)
         { }
     std::string          path;