--- libs/filesystem/src/windows_file_codecvt.hpp
+++ libs/filesystem/src/windows_file_codecvt.hpp
@@ -26,8 +26,8 @@
     : public std::codecvt< wchar_t, char, std::mbstate_t >  
   {
   public:
-    explicit windows_file_codecvt()
-        : std::codecvt<wchar_t, char, std::mbstate_t>() {}
+    explicit windows_file_codecvt(size_t refs = 0)
+        : std::codecvt<wchar_t, char, std::mbstate_t>(refs) {}
   protected:

     virtual bool do_always_noconv() const throw() { return false; }
--- libs/filesystem/src/path.cpp
+++ libs/filesystem/src/path.cpp
@@ -801,7 +801,7 @@
   inline std::locale default_locale()
   {
     std::locale global_loc = std::locale();
-    std::locale loc(global_loc, new windows_file_codecvt);
+    std::locale loc(global_loc, new windows_file_codecvt(1));
     return loc;
   }

@@ -822,7 +822,7 @@

 #elif defined(BOOST_WINDOWS_API) && !defined(BOOST_FILESYSTEM_STATIC_LINK)

-  std::locale path_locale(std::locale(), new windows_file_codecvt); 
+  std::locale path_locale(std::locale(), new windows_file_codecvt(1)); 

   const std::codecvt<wchar_t, char, std::mbstate_t>*
     codecvt_facet_ptr(&std::use_facet<std::codecvt<wchar_t, char, std::mbstate_t> >