Fix

Author: Tinche

src/cattrs/preconf/json.py

@@ -8,14 +8,10 @@
 
 from .._compat import Counter
 from ..converters import BaseConverter, Converter
+from ..fns import identity
 from ..literals import is_literal_containing_enums
 from ..strategies import configure_union_passthrough
-from . import (
-    is_primitive_enum,
-    literals_with_enums_unstructure_factory,
-    primitive_enum_unstructure_factory,
-    wrap,
-)
+from . import is_primitive_enum, literals_with_enums_unstructure_factory, wrap
 
 __all__ = ["JsonConverter", "configure_converter", "make_converter"]
 
@@ -56,9 +52,7 @@ def configure_converter(converter: BaseConverter) -> None:
     converter.register_unstructure_hook_factory(
         is_literal_containing_enums, literals_with_enums_unstructure_factory
     )
-    converter.register_unstructure_hook_factory(
-        is_primitive_enum, primitive_enum_unstructure_factory
-    )
+    converter.register_unstructure_hook_factory(is_primitive_enum, identity)
     configure_union_passthrough(Union[str, bool, int, float, None], converter)