diff --git a/synapse/storage/databases/main/stats.py b/synapse/storage/databases/main/stats.py
index d7816a860..5beb302be 100644
--- a/synapse/storage/databases/main/stats.py
+++ b/synapse/storage/databases/main/stats.py
@@ -210,6 +210,7 @@ class StatsStore(StateDeltasStore):
         * topic
         * avatar
         * canonical_alias
+        * guest_access
 
         A is_federatable key can also be included with a boolean value.
 
@@ -234,6 +235,7 @@ class StatsStore(StateDeltasStore):
             "topic",
             "avatar",
             "canonical_alias",
+            "guest_access",
         ):
             field = fields.get(col, sentinel)
             if field is not sentinel and (not isinstance(field, str) or "\0" in field):