1 files changed, 2 insertions, 4 deletions
diff --git a/src/mailman/rules/suspicious.py b/src/mailman/rules/suspicious.py
index d385ea490..f349a313e 100644
--- a/src/mailman/rules/suspicious.py
+++ b/src/mailman/rules/suspicious.py
@@ -20,18 +20,16 @@
 import re
 import logging
 
+from mailman import public
 from mailman.core.i18n import _
 from mailman.interfaces.rules import IRule
 from zope.interface import implementer
 
-__all__ = [
-    'SuspiciousHeader',
-    ]
-
 
 log = logging.getLogger('mailman.error')
 
 
+@public
 @implementer(IRule)
 class SuspiciousHeader:
     """The historical 'suspicious header' rule."""