diff --git a/include/boost/detail/named_template_params.hpp b/include/boost/detail/named_template_params.hpp
index 8998854..4648dc6 100644
--- a/include/boost/detail/named_template_params.hpp
+++ b/include/boost/detail/named_template_params.hpp
@@ -88,24 +88,9 @@ namespace boost {
     // we use is_convertible<X, iter_traits_gen_base>.
     struct named_template_param_base { };
 
-    struct is_convertible_to_named_param {
-      template <class X> struct bind {
-	enum { value = is_convertible<X*, named_template_param_base*>::value };
-      };
-    };
-    struct not_named_param {
-      template <class X> struct bind {
-	enum { value = false };
-      };
-    };
-
     template <class X>
     struct is_named_param_list {
-      // If X is a reference type, we can't form a pointer and use is_convertible<X*, ...>,
-      // but we know that if it is a reference, it isn't a named parameter.
-      typedef typename ct_if<is_reference<X>::value,
-	not_named_param, is_convertible_to_named_param>::type IsNamedParam;
-      enum { value  = IsNamedParam::template bind<X>::value };
+      enum { value  = is_convertible<X, named_template_param_base>::value };
     };
     
     struct choose_named_params {