1 files changed, 1 insertions, 1 deletions
diff --git a/synapse/handlers/pagination.py b/synapse/handlers/pagination.py
index 7ee3340373..2e30180094 100644
--- a/synapse/handlers/pagination.py
+++ b/synapse/handlers/pagination.py
@@ -448,7 +448,7 @@ class PaginationHandler:
             )
             # We expect `/messages` to use historic pagination tokens by default but
             # `/messages` should still works with live tokens when manually provided.
-            assert from_token.room_key.topological
+            assert from_token.room_key.topological is not None
 
         if pagin_config.limit is None:
             # This shouldn't happen as we've set a default limit before this