1 files changed, 1 insertions, 3 deletions
diff --git a/synapse/federation/units.py b/synapse/federation/units.py
index 01c5b8fe17..c5ab14314e 100644
--- a/synapse/federation/units.py
+++ b/synapse/federation/units.py
@@ -17,10 +17,9 @@
 server protocol.
 """
 
-from synapse.util.jsonobject import JsonEncodedObject
-
 import logging
 
+from synapse.util.jsonobject import JsonEncodedObject
 
 logger = logging.getLogger(__name__)
 
@@ -74,7 +73,6 @@ class Transaction(JsonEncodedObject):
         "previous_ids",
         "pdus",
         "edus",
-        "pdu_failures",
     ]
 
     internal_keys = [