1 files changed, 1 insertions, 0 deletions

diff --git a/synapse/api/events/__init__.py b/synapse/api/events/__init__.py

index 168b812311..fc3f350570 100644
--- a/synapse/api/events/__init__.py
+++ b/synapse/api/events/__init__.py
@@ -60,6 +60,7 @@ class SynapseEvent(JsonEncodedObject):
         "age_ts",
         "prev_content",
         "prev_state",
+        "replaces_state",
         "redacted_because",
         "origin_server_ts",
     ]