diff --git a/include/chaiscript/dispatchkit/boxed_value.hpp b/include/chaiscript/dispatchkit/boxed_value.hpp
index 538391f..d394d69 100644
--- a/include/chaiscript/dispatchkit/boxed_value.hpp
+++ b/include/chaiscript/dispatchkit/boxed_value.hpp
@@ -226,48 +226,47 @@ namespace chaiscript
         return m_data->m_type_info.bare_equal(ti);
       }
 
-      template<typename T>
-      struct Sentinel {
-        Sentinel(std::shared_ptr<T> &ptr, Data &data)
-          : m_ptr(ptr), m_data(data)
-        {
-        }
-
-        ~Sentinel()
-        {
-          // save new pointer data
-          m_data.get().m_data_ptr = m_ptr.get().get();
-          m_data.get().m_const_data_ptr = m_ptr.get().get();
-        }
-
-        Sentinel& operator=(Sentinel&&s) {
-          m_ptr = std::move(s.m_ptr);
-          m_data = std::move(s.m_data);
-        }
-
-        Sentinel(Sentinel &&s)
-          : m_ptr(std::move(s.m_ptr)),
-            m_data(std::move(s.m_data))
-        {
-        }
-
-        operator std::shared_ptr<T>&() const
-        {
-          return m_ptr.get();
-        }
-
-        Sentinel &operator=(const Sentinel &) = delete;
-        Sentinel(Sentinel&) = delete;
-
-        std::reference_wrapper<std::shared_ptr<T>> m_ptr;
-        std::reference_wrapper<Data> m_data;
-      };
-
 
       template<typename T>
-      Sentinel<T> pointer_sentinel(std::shared_ptr<T> &ptr) const
+      auto pointer_sentinel(std::shared_ptr<T> &ptr) const
       {
-        return Sentinel<T>(ptr, *(m_data.get()));
+        struct Sentinel {
+          Sentinel(std::shared_ptr<T> &ptr, Data &data)
+            : m_ptr(ptr), m_data(data)
+          {
+          }
+
+          ~Sentinel()
+          {
+            // save new pointer data
+            m_data.get().m_data_ptr = m_ptr.get().get();
+            m_data.get().m_const_data_ptr = m_ptr.get().get();
+          }
+
+          Sentinel& operator=(Sentinel&&s) {
+            m_ptr = std::move(s.m_ptr);
+            m_data = std::move(s.m_data);
+          }
+
+          Sentinel(Sentinel &&s)
+            : m_ptr(std::move(s.m_ptr)),
+            m_data(std::move(s.m_data))
+          {
+          }
+
+          operator std::shared_ptr<T>&() const
+          {
+            return m_ptr.get();
+          }
+
+          Sentinel &operator=(const Sentinel &) = delete;
+          Sentinel(Sentinel&) = delete;
+
+          std::reference_wrapper<std::shared_ptr<T>> m_ptr;
+          std::reference_wrapper<Data> m_data;
+        };
+
+        return Sentinel(ptr, *(m_data.get()));
       }
 
       bool is_null() const noexcept
diff --git a/include/chaiscript/dispatchkit/proxy_functions.hpp b/include/chaiscript/dispatchkit/proxy_functions.hpp
index e7a8ad9..7a2fa28 100644
--- a/include/chaiscript/dispatchkit/proxy_functions.hpp
+++ b/include/chaiscript/dispatchkit/proxy_functions.hpp
@@ -595,8 +595,7 @@ namespace chaiscript
       protected:
         Boxed_Value do_call(const std::vector<Boxed_Value> &params, const Type_Conversions_State &t_conversions) const override
         {
-          typedef typename detail::Function_Signature<Func>::Return_Type Return_Type;
-          return detail::Do_Call<Return_Type>::template go<Func>(m_f, params, t_conversions);
+          return detail::call_func(detail::Function_Signature<Func>(), m_f, params, t_conversions);
         }
 
       private:
@@ -648,7 +647,7 @@ namespace chaiscript
       protected:
         Boxed_Value do_call(const std::vector<Boxed_Value> &params, const Type_Conversions_State &t_conversions) const override
         {
-          return detail::Do_Call<typename std::function<Func>::result_type>::template go<Func>(m_f.get(), params, t_conversions);
+          return detail::call_func(detail::Function_Signature<Func>(), m_f.get(), params, t_conversions);
         }
 
 
diff --git a/include/chaiscript/dispatchkit/proxy_functions_detail.hpp b/include/chaiscript/dispatchkit/proxy_functions_detail.hpp
index 69b88a8..54a1c6e 100644
--- a/include/chaiscript/dispatchkit/proxy_functions_detail.hpp
+++ b/include/chaiscript/dispatchkit/proxy_functions_detail.hpp
@@ -99,17 +99,23 @@ namespace chaiscript
         }
 
 
-      /**
-       * Used by Proxy_Function_Impl to perform typesafe execution of a function.
-       * The function attempts to unbox each parameter to the expected type.
-       * if any unboxing fails the execution of the function fails and
-       * the bad_boxed_cast is passed up to the caller.
-       */
+      /// Used by Proxy_Function_Impl to perform typesafe execution of a function.
+      /// The function attempts to unbox each parameter to the expected type.
+      /// if any unboxing fails the execution of the function fails and
+      /// the bad_boxed_cast is passed up to the caller.
       template<typename Callable, typename Ret, typename ... Params>
-        Ret call_func(const chaiscript::dispatch::detail::Function_Signature<Ret (Params...)> &sig, const Callable &f,
+        Boxed_Value call_func(const chaiscript::dispatch::detail::Function_Signature<Ret (Params...)> &sig, const Callable &f,
             const std::vector<Boxed_Value> &params, const Type_Conversions_State &t_conversions)
         {
-          return call_func(sig, std::index_sequence_for<Params...>{}, f, params, t_conversions);
+          return Handle_Return<Ret>::handle(call_func(sig, std::index_sequence_for<Params...>{}, f, params, t_conversions));
+        }
+
+      template<typename Callable, typename ... Params>
+        Boxed_Value call_func(const chaiscript::dispatch::detail::Function_Signature<void (Params...)> &sig, const Callable &f,
+            const std::vector<Boxed_Value> &params, const Type_Conversions_State &t_conversions)
+        {
+          call_func(sig, std::index_sequence_for<Params...>{}, f, params, t_conversions);
+          return Handle_Return<void>::handle();
         }
 
     }
@@ -118,34 +124,4 @@ namespace chaiscript
 }
 
 
-namespace chaiscript
-{
-  namespace dispatch
-  {
-    namespace detail
-    {
-    template<typename Ret>
-      struct Do_Call
-      {
-        template<typename Signature, typename Callable>
-          static Boxed_Value go(const Callable &fun, const std::vector<Boxed_Value> &params, const Type_Conversions_State &t_conversions)
-          {
-            return Handle_Return<Ret>::handle(call_func(Function_Signature<Signature>(), fun, params, t_conversions));
-          }
-      };
-
-    template<>
-      struct Do_Call<void>
-      {
-        template<typename Signature, typename Callable>
-          static Boxed_Value go(const Callable &fun, const std::vector<Boxed_Value> &params, const Type_Conversions_State &t_conversions)
-          {
-            call_func(Function_Signature<Signature>(), fun, params, t_conversions);
-            return Handle_Return<void>::handle();
-          }
-      };
-    }
-  }
-}
-
 #endif