1 files changed, 3 insertions, 3 deletions

diff --git a/src/mailman/rest/validator.py b/src/mailman/rest/validator.py
index 0a6184850..bcc6b3321 100644
--- a/src/mailman/rest/validator.py
+++ b/src/mailman/rest/validator.py
@@ -52,14 +52,14 @@ class ReadOnlyPATCHRequestError(RESTError):
 class enum_validator:
     """Convert an enum value name into an enum value."""
 
-    def __init__(self, enum_class, allow_none=False):
+    def __init__(self, enum_class, *, allow_blank=False):
         self._enum_class = enum_class
-        self._allow_none = allow_none
+        self._allow_blank = allow_blank
 
     def __call__(self, enum_value):
         # This will raise a KeyError if the enum value is unknown.  The
         # Validator API requires turning this into a ValueError.
-        if self._allow_none and not enum_value:
+        if not enum_value and self._allow_blank:
             return None
         try:
             return self._enum_class[enum_value]