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-rw-r--r--synapse/storage/persist_events.py6
1 files changed, 5 insertions, 1 deletions
diff --git a/synapse/storage/persist_events.py b/synapse/storage/persist_events.py
index 0e8270746d..402f134d89 100644
--- a/synapse/storage/persist_events.py
+++ b/synapse/storage/persist_events.py
@@ -18,6 +18,7 @@ import itertools
 import logging
 from collections import deque
 from typing import (
+    TYPE_CHECKING,
     Any,
     Awaitable,
     Callable,
@@ -56,6 +57,9 @@ from synapse.types import (
 from synapse.util.async_helpers import ObservableDeferred, yieldable_gather_results
 from synapse.util.metrics import Measure
 
+if TYPE_CHECKING:
+    from synapse.server import HomeServer
+
 logger = logging.getLogger(__name__)
 
 # The number of times we are recalculating the current state
@@ -272,7 +276,7 @@ class EventsPersistenceStorage:
     current state and forward extremity changes.
     """
 
-    def __init__(self, hs, stores: Databases):
+    def __init__(self, hs: "HomeServer", stores: Databases):
         # We ultimately want to split out the state store from the main store,
         # so we use separate variables here even though they point to the same
         # store for now.