diff --git a/include/boost/concept/requires.hpp b/include/boost/concept/requires.hpp
index 024ba74..7a74d2f 100644
--- a/include/boost/concept/requires.hpp
+++ b/include/boost/concept/requires.hpp
@@ -15,9 +15,6 @@ namespace boost {
 template <class Model, class More>
 struct requires_ : More
 {
-# if BOOST_WORKAROUND(BOOST_MSVC, <= 1300)
-    typedef typename More::type type;
-# endif 
     BOOST_CONCEPT_ASSERT((Model));
 };
 
@@ -34,9 +31,6 @@ struct _requires_
 template <int check, class Result>
 struct Requires_ : ::boost::parameter::aux::unaryfunptr_arg_type<Result>
 {
-# if BOOST_WORKAROUND(BOOST_MSVC, <= 1300)
-    typedef typename ::boost::parameter::aux::unaryfunptr_arg_type<Result>::type type;
-# endif 
 };
 
 # if BOOST_WORKAROUND(BOOST_INTEL_WIN, BOOST_TESTED_AT(1010))
@@ -45,7 +39,7 @@ struct Requires_ : ::boost::parameter::aux::unaryfunptr_arg_type<Result>
 #  define BOOST_CONCEPT_REQUIRES_(r,data,t) + (::boost::_requires_<void(*)t>::value)
 # endif
 
-#if defined(NDEBUG) || BOOST_WORKAROUND(BOOST_MSVC, < 1300)
+#if defined(NDEBUG)
 
 # define BOOST_CONCEPT_REQUIRES(models, result)                                    \
     typename ::boost::parameter::aux::unaryfunptr_arg_type<void(*)result>::type