Index: usinstances.cpp
===================================================================
--- usinstances.cpp	(revision 1)
+++ usinstances.cpp	(working copy)
@@ -49,6 +49,7 @@
 #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
+template<> _CRTIMP2 std::allocator<unsigned short>::allocator(void);
 }
 #endif
 
Index: wc_regex_traits.cpp
===================================================================
--- wc_regex_traits.cpp	(revision 1)
+++ wc_regex_traits.cpp	(working copy)
@@ -29,6 +29,8 @@
 #include <boost/regex/v4/primary_transform.hpp>
 #include <boost/regex/v4/regex_traits_defaults.hpp>
 
+template<> _CRTIMP2 std::allocator<unsigned short>::allocator(void);
+
 #if defined(BOOST_NO_STDC_NAMESPACE)
 namespace std{
    using ::wcstol;