diff --git a/art/json/marshaling.hxx b/art/json/marshaling.hxx
index 1f084ed..62a06b8 100644
--- a/art/json/marshaling.hxx
+++ b/art/json/marshaling.hxx
@@ -26,6 +26,21 @@
 namespace art::json
 {
 
+  struct access
+  {
+    template<typename T>
+    using json = T::json;
+
+    template<typename T>
+    static
+    T
+    create()
+    {
+      return T{};
+    }
+
+  };
+
   class marshaling_context_t
   {
   protected:
@@ -208,7 +223,7 @@ namespace art::json
     T
     unmarshal(variant const& v, marshaling_context_t* context)
     {
-      T instance;
+      auto instance = access::create<T>();
       do_unmarshal(instance, v, context);
       return instance;
     }
@@ -222,7 +237,7 @@ namespace art::json
       void
       do_marshal(variant& v, T const& instance, marshaling_context_t* context)
       {
-        ((Bases::json::do_marshal(v, instance, context)), ...);
+        ((access::json<Bases>::do_marshal(v, instance, context)), ...);
         First::marshal(v, instance, context);
         ((Members::marshal(v, instance, context)), ...);
       }
@@ -240,7 +255,7 @@ namespace art::json
       void
       do_unmarshal(T& instance, variant const& v, marshaling_context_t* context)
       {
-        ((Bases::json::do_unmarshal(instance, v, context)), ...);
+        ((access::json<Bases>::do_unmarshal(instance, v, context)), ...);
         First::unmarshal(instance, v, context);
         ((Members::unmarshal(instance, v, context)), ...);
 
@@ -253,7 +268,7 @@ namespace art::json
       T
       unmarshal(variant const& v, marshaling_context_t* context)
       {
-        T instance;
+        auto instance = access::create<T>();
         do_unmarshal(instance, v, context);
         return instance;
       }
@@ -309,14 +324,14 @@ namespace art::json
     variant
     marshal(T const& instance, marshaling_context_t* context)
     {
-      return T::json::marshal(instance, context);
+      return access::json<T>::marshal(instance, context);
     }
 
     static
     T
     unmarshal(variant const& v, marshaling_context_t* context)
     {
-      return T::json::unmarshal(v, context);
+      return access::json<T>::unmarshal(v, context);
     }
 
   };