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-rw-r--r--synapse/handlers/typing.py8
1 files changed, 4 insertions, 4 deletions
diff --git a/synapse/handlers/typing.py b/synapse/handlers/typing.py
index a0ea719430..3f656ea4f5 100644
--- a/synapse/handlers/typing.py
+++ b/synapse/handlers/typing.py
@@ -420,11 +420,11 @@ class TypingWriterHandler(FollowerTypingHandler):
         if last_id == current_id:
             return [], current_id, False
 
-        changed_rooms: Optional[
-            Iterable[str]
-        ] = self._typing_stream_change_cache.get_all_entities_changed(last_id)
+        result = self._typing_stream_change_cache.get_all_entities_changed(last_id)
 
-        if changed_rooms is None:
+        if result.hit:
+            changed_rooms: Iterable[str] = result.entities
+        else:
             changed_rooms = self._room_serials
 
         rows = []