diff --git a/Upsilon/BoundTypes/UserDataBoundTypeDefinition.cs b/Upsilon/BoundTypes/UserDataBoundTypeDefinition.cs
index 6cad4dc..4d25de9 100644
--- a/Upsilon/BoundTypes/UserDataBoundTypeDefinition.cs
+++ b/Upsilon/BoundTypes/UserDataBoundTypeDefinition.cs
@@ -17,6 +17,15 @@ namespace Upsilon.BoundTypes
             Name = backingType.Name;
         }
 
+        public UserDataBoundTypeDefinition(string name, Dictionary<string, UserDataBoundProperty> backingType)
+            : base(Type.UserData, typeof(void))
+        {
+            Name = name;
+            Properties = backingType;
+        }
+
+
+
         public static UserDataBoundTypeDefinition Create(System.Type backingType)
         {
             var obj = new UserDataBoundTypeDefinition(backingType)