diff --git a/src/usinstances.cpp b/src/usinstances.cpp
index e633659e..390cd254 100644
--- a/src/usinstances.cpp
+++ b/src/usinstances.cpp
@@ -18,46 +18,59 @@
 
 #define BOOST_REGEX_SOURCE
 
+#include <boost/detail/workaround.hpp>
+#include <memory>
+#include <string>
+
+#if defined(_DLL_CPPLIB) && !defined(_M_CEE_PURE) \
+   && !(defined(__SGI_STL_PORT) || defined(_STLPORT_VERSION) || defined(__STD_RWCOMPILER_H__) || defined(_RWSTD_VER))
+//
+// This is a horrible workaround, but without declaring these symbols extern we get
+// duplicate symbol errors when linking if the application is built without
+// /Zc:wchar_t
+//
+#ifdef _CRTIMP2_PURE
+#  define BOOST_REGEX_STDLIB_DECL _CRTIMP2_PURE
+#else
+#  define BOOST_REGEX_STDLIB_DECL _CRTIMP2
+#endif
+
+namespace std{
+
+#if BOOST_WORKAROUND(BOOST_MSVC, >= 1400)
+template class BOOST_REGEX_STDLIB_DECL allocator<unsigned short>;
+template class BOOST_REGEX_STDLIB_DECL _String_val<unsigned short, allocator<unsigned short> >;
+template class BOOST_REGEX_STDLIB_DECL basic_string<unsigned short, char_traits<unsigned short>,
+	allocator<unsigned short> >;
+#endif
+
+#if BOOST_WORKAROUND(BOOST_MSVC, > 1300) && BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1400))
+template<> BOOST_REGEX_STDLIB_DECL std::size_t __cdecl char_traits<unsigned short>::length(unsigned short const*);
+#endif
+
+template BOOST_REGEX_STDLIB_DECL bool __cdecl operator==(
+   const basic_string<unsigned short, char_traits<unsigned short>, allocator<unsigned short> >&,
+   const basic_string<unsigned short, char_traits<unsigned short>, allocator<unsigned short> >&);
+template BOOST_REGEX_STDLIB_DECL bool __cdecl operator==(
+   const unsigned short *,
+   const basic_string<unsigned short, char_traits<unsigned short>, allocator<unsigned short> >&);
+template BOOST_REGEX_STDLIB_DECL bool __cdecl operator==(
+   const basic_string<unsigned short, char_traits<unsigned short>, allocator<unsigned short> >&,
+   const unsigned short *);
+template BOOST_REGEX_STDLIB_DECL bool __cdecl operator<(
+   const basic_string<unsigned short, char_traits<unsigned short>, allocator<unsigned short> >&,
+   const basic_string<unsigned short, char_traits<unsigned short>, allocator<unsigned short> >&);
+template BOOST_REGEX_STDLIB_DECL bool __cdecl operator>(
+   const basic_string<unsigned short, char_traits<unsigned short>, allocator<unsigned short> >&,
+   const basic_string<unsigned short, char_traits<unsigned short>, allocator<unsigned short> >&);
+}
+#endif
+
 #include <boost/regex/config.hpp>
 
 #if !defined(BOOST_NO_WREGEX) && defined(BOOST_REGEX_HAS_OTHER_WCHAR_T) && !defined(BOOST_REGEX_NO_EXTERNAL_TEMPLATES)
 #define BOOST_REGEX_US_INSTANTIATE
 
-#ifdef _DLL_CPPLIB
-#include <boost/detail/workaround.hpp>
-#include <memory>
-#include <string>
-//
-// This is a horrible workaround, without declaring these symbols extern we get
-// duplicate symbol errors when linking if the application is built without
-// /Zc:wchar_t
-//
-namespace std{
-template _CRTIMP2 bool __cdecl operator==(
-   const basic_string<unsigned short, char_traits<unsigned short>, allocator<unsigned short> >&,
-   const basic_string<unsigned short, char_traits<unsigned short>, allocator<unsigned short> >&);
-template _CRTIMP2 bool __cdecl operator==(
-   const unsigned short *,
-   const basic_string<unsigned short, char_traits<unsigned short>, allocator<unsigned short> >&);
-template _CRTIMP2 bool __cdecl operator==(
-   const basic_string<unsigned short, char_traits<unsigned short>, allocator<unsigned short> >&,
-   const unsigned short *);
-template _CRTIMP2 bool __cdecl operator<(
-   const basic_string<unsigned short, char_traits<unsigned short>, allocator<unsigned short> >&,
-   const basic_string<unsigned short, char_traits<unsigned short>, allocator<unsigned short> >&);
-template _CRTIMP2 bool __cdecl operator>(
-   const basic_string<unsigned short, char_traits<unsigned short>, allocator<unsigned short> >&,
-   const basic_string<unsigned short, char_traits<unsigned short>, allocator<unsigned short> >&);
-#if BOOST_WORKAROUND(BOOST_MSVC, > 1300) && BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1400))
-template<> _CRTIMP2 std::size_t __cdecl char_traits<unsigned short>::length(unsigned short const*);
-#endif
-#if BOOST_WORKAROUND(BOOST_MSVC, >= 1400)
-template _CRTIMP2 allocator<unsigned short>::allocator();
-#endif
-}
-#endif
-
-
 #include <boost/regex.hpp>
 
 #endif