diff --git a/implementations/python/preserves/schema.py b/implementations/python/preserves/schema.py
index 73b0b4b..ebfd2e4 100644
--- a/implementations/python/preserves/schema.py
+++ b/implementations/python/preserves/schema.py
@@ -163,9 +163,10 @@ class Enumeration(SchemaObject):
         cls.MODULE_PATH = module_path
         cls.NAME = name
         cls.VARIANTS = []
+        cls._ALL = pretty_subclass(Definition, module_path_str(module_path + (name,)), '_ALL')
         for (n, d) in schema[0]:
             n = Symbol(n)
-            c = pretty_subclass(Definition, module_path_str(module_path + (name,)), n.name)
+            c = pretty_subclass(cls._ALL, module_path_str(module_path + (name,)), n.name)
             c._set_schema(rootns, module_path, name, d, n, cls)
             cls.VARIANTS.append((n, c))
             safesetattr(cls, n.name, c)
diff --git a/implementations/python/setup.py b/implementations/python/setup.py
index 767b0ae..ab67770 100644
--- a/implementations/python/setup.py
+++ b/implementations/python/setup.py
@@ -5,7 +5,7 @@ except ImportError:
 
 setup(
     name="preserves",
-    version="0.12.0",
+    version="0.13.0",
     author="Tony Garnock-Jones",
     author_email="tonyg@leastfixedpoint.com",
     license="Apache Software License",