diff --git a/synapse/visibility.py b/synapse/visibility.py
index 82a213242..fce585541 100644
--- a/synapse/visibility.py
+++ b/synapse/visibility.py
@@ -121,7 +121,11 @@ def filter_events_for_client(
         if event.type == "org.matrix.dummy_event" and filter_send_to_client:
             return None
 
-        if not event.is_state() and event.sender in ignore_list and filter_send_to_client:
+        if (
+            not event.is_state()
+            and event.sender in ignore_list
+            and filter_send_to_client
+        ):
             return None
 
         # Until MSC2261 has landed we can't redact malicious alias events, so for