1 files changed, 1 insertions, 1 deletions
diff --git a/synapse/storage/_base.py b/synapse/storage/_base.py
index dba50f1213..30c5103cdd 100644
--- a/synapse/storage/_base.py
+++ b/synapse/storage/_base.py
@@ -361,7 +361,7 @@ class SQLBaseStore(object):
 
         if "age_ts" not in d:
             # For compatibility
-            d["age_ts"] = d["ts"] if "ts" in d else 0
+            d["age_ts"] = d["origin_server_ts"] if "origin_server_ts" in d else 0
 
         return self.event_factory.create_event(
             etype=d["type"],