1 files changed, 4 insertions, 4 deletions

diff --git a/src/mailman/mta/null.py b/src/mailman/mta/null.py
index 6b2f76a1c..c94fa1015 100644
--- a/src/mailman/mta/null.py
+++ b/src/mailman/mta/null.py
@@ -20,7 +20,7 @@
 Exim one example of an MTA that Just Works.
 """
 
-from __future__ import absolute_import, unicode_literals
+from __future__ import absolute_import, print_function, unicode_literals
 
 __metaclass__ = type
 __all__ = [
@@ -28,16 +28,16 @@ __all__ = [
     ]
 
 
-from zope.interface import implements
+from zope.interface import implementer
+
 from mailman.interfaces.mta import IMailTransportAgentLifecycle
 
 
 
+@implementer(IMailTransportAgentLifecycle)
 class NullMTA:
     """Null MTA that just satisfies the interface."""
 
-    implements(IMailTransportAgentLifecycle)
-
     def create(self, mlist):
         """See `IMailTransportAgentLifecycle`."""
         pass