1 files changed, 2 insertions, 0 deletions
diff --git a/synapse/events/utils.py b/synapse/events/utils.py
index 1aa952150e..4c82780f46 100644
--- a/synapse/events/utils.py
+++ b/synapse/events/utils.py
@@ -74,6 +74,8 @@ def prune_event(event):
         )
     elif event_type == EventTypes.Aliases:
         add_fields("aliases")
+    elif event_type == EventTypes.RoomHistoryVisibility:
+        add_fields("visibility")
 
     allowed_fields = {
         k: v