1 files changed, 2 insertions, 3 deletions

diff --git a/src/mailman/model/listmanager.py b/src/mailman/model/listmanager.py
index 8d845b36f..b4bc4b323 100644
--- a/src/mailman/model/listmanager.py
+++ b/src/mailman/model/listmanager.py
@@ -26,7 +26,7 @@ __all__ = [
 
 
 from zope.event import notify
-from zope.interface import implements
+from zope.interface import implementer
 
 from mailman.database.transaction import dbconnection
 from mailman.interfaces.address import InvalidEmailAddressError
@@ -38,11 +38,10 @@ from mailman.utilities.datetime import now
 
 
 
+@implementer(IListManager)
 class ListManager:
     """An implementation of the `IListManager` interface."""
 
-    implements(IListManager)
-
     @dbconnection
     def create(self, store, fqdn_listname):
         """See `IListManager`."""