1 files changed, 5 insertions, 3 deletions
diff --git a/synapse/federation/federation_server.py b/synapse/federation/federation_server.py
index e8039e244c..23278e36b7 100644
--- a/synapse/federation/federation_server.py
+++ b/synapse/federation/federation_server.py
@@ -116,7 +116,7 @@ class FederationServer(FederationBase):
         # We cache results for transaction with the same ID
         self._transaction_resp_cache = ResponseCache(
             hs, "fed_txn_handler", timeout_ms=30000
-        )
+        )  # type: ResponseCache[Tuple[str, str]]
 
         self.transaction_actions = TransactionActions(self.store)
 
@@ -124,10 +124,12 @@ class FederationServer(FederationBase):
 
         # We cache responses to state queries, as they take a while and often
         # come in waves.
-        self._state_resp_cache = ResponseCache(hs, "state_resp", timeout_ms=30000)
+        self._state_resp_cache = ResponseCache(
+            hs, "state_resp", timeout_ms=30000
+        )  # type: ResponseCache[Tuple[str, str]]
         self._state_ids_resp_cache = ResponseCache(
             hs, "state_ids_resp", timeout_ms=30000
-        )
+        )  # type: ResponseCache[Tuple[str, str]]
 
         self._federation_metrics_domains = (
             hs.get_config().federation.federation_metrics_domains