1 files changed, 1 insertions, 0 deletions
diff --git a/synapse/api/events/__init__.py b/synapse/api/events/__init__.py
index b855811b98..168b812311 100644
--- a/synapse/api/events/__init__.py
+++ b/synapse/api/events/__init__.py
@@ -61,6 +61,7 @@ class SynapseEvent(JsonEncodedObject):
         "prev_content",
         "prev_state",
         "redacted_because",
+        "origin_server_ts",
     ]
 
     internal_keys = [