1 files changed, 3 insertions, 1 deletions
diff --git a/synapse/storage/databases/main/transactions.py b/synapse/storage/databases/main/transactions.py
index c3bd36efc9..48e4b0ba3c 100644
--- a/synapse/storage/databases/main/transactions.py
+++ b/synapse/storage/databases/main/transactions.py
@@ -242,6 +242,8 @@ class TransactionWorkerStore(CacheInvalidationWorkerStore):
     ) -> None:
         # Upsert retry time interval if retry_interval is zero (i.e. we're
         # resetting it) or greater than the existing retry interval.
+        # We also upsert when the new retry interval is the same as the existing one,
+        # since it will be the case when `destination_max_retry_interval` is reached.
         #
         # WARNING: This is executed in autocommit, so we shouldn't add any more
         # SQL calls in here (without being very careful).
@@ -257,7 +259,7 @@ class TransactionWorkerStore(CacheInvalidationWorkerStore):
                 WHERE
                     EXCLUDED.retry_interval = 0
                     OR destinations.retry_interval IS NULL
-                    OR destinations.retry_interval < EXCLUDED.retry_interval
+                    OR destinations.retry_interval <= EXCLUDED.retry_interval
         """
 
         txn.execute(sql, (destination, failure_ts, retry_last_ts, retry_interval))