diff --git a/include/boost/fusion/support/category_of.hpp b/include/boost/fusion/support/category_of.hpp
index 92b0ea1b..7397c45a 100644
--- a/include/boost/fusion/support/category_of.hpp
+++ b/include/boost/fusion/support/category_of.hpp
@@ -8,7 +8,6 @@
 #define FUSION_CATEGORY_OF_07202005_0308
 
 #include <boost/fusion/support/config.hpp>
-#include <boost/fusion/support/detail/category_of.hpp>
 #include <boost/fusion/support/tag_of.hpp>
 #include <boost/type_traits/is_base_of.hpp>
 
@@ -44,7 +43,10 @@ namespace boost { namespace fusion
         struct category_of_impl
         {
             template<typename T>
-            struct apply : detail::fusion_category_of<T> {};
+            struct apply
+            {
+                typedef typename T::category type;
+            };
         };
 
         template <>
diff --git a/include/boost/fusion/support/detail/category_of.hpp b/include/boost/fusion/support/detail/category_of.hpp
deleted file mode 100644
index e7ac44e5..00000000
--- a/include/boost/fusion/support/detail/category_of.hpp
+++ /dev/null
@@ -1,19 +0,0 @@
-/*=============================================================================
-    Copyright (c) 2001-2011 Joel de Guzman
-
-    Distributed under the Boost Software License, Version 1.0. (See accompanying 
-    file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
-==============================================================================*/
-#if !defined(FUSION_CATEGORY_OF_07212005_1025)
-#define FUSION_CATEGORY_OF_07212005_1025
-
-namespace boost { namespace fusion { namespace detail
-{
-    template <typename T>
-    struct fusion_category_of
-    {
-        typedef typename T::category type;
-    };
-}}}
-
-#endif
diff --git a/include/boost/fusion/support/detail/is_view.hpp b/include/boost/fusion/support/detail/is_view.hpp
deleted file mode 100644
index c518dfc4..00000000
--- a/include/boost/fusion/support/detail/is_view.hpp
+++ /dev/null
@@ -1,19 +0,0 @@
-/*=============================================================================
-    Copyright (c) 2001-2011 Joel de Guzman
-
-    Distributed under the Boost Software License, Version 1.0. (See accompanying 
-    file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
-==============================================================================*/
-#if !defined(FUSION_IS_VIEW_03202006_0018)
-#define FUSION_IS_VIEW_03202006_0018
-
-namespace boost { namespace fusion { namespace detail
-{
-    template <typename T>
-    struct fusion_is_view
-    {
-        typedef typename T::is_view type;
-    };
-}}}
-
-#endif
diff --git a/include/boost/fusion/support/is_view.hpp b/include/boost/fusion/support/is_view.hpp
index c54e60e1..a6ca7259 100644
--- a/include/boost/fusion/support/is_view.hpp
+++ b/include/boost/fusion/support/is_view.hpp
@@ -9,7 +9,6 @@
 
 #include <boost/fusion/support/config.hpp>
 #include <boost/mpl/bool.hpp>
-#include <boost/fusion/support/detail/is_view.hpp>
 #include <boost/fusion/support/tag_of.hpp>
 
 namespace boost { namespace fusion
@@ -28,8 +27,9 @@ namespace boost { namespace fusion
         {
             template <typename T>
             struct apply
-                : detail::fusion_is_view<T>
-            {};
+            {
+                typedef typename T::is_view type;
+            };
         };
 
         template <>