diff --git a/weboob/backends/aum/backend.py b/weboob/backends/aum/backend.py
index 3a32993c..33be1bb9 100644
--- a/weboob/backends/aum/backend.py
+++ b/weboob/backends/aum/backend.py
@@ -30,3 +30,6 @@ class AuMBackend(Backend, ICapMessages, ICapMessagesReply):
 
     def iter_messages(self, thread=None):
         return dict().iteritems()
+
+    def iter_new_messages(self, thread=None):
+        return dict().iteritems()