diff --git a/synapse/storage/group_server.py b/synapse/storage/group_server.py
index d2437ff9c..095a3dd38 100644
--- a/synapse/storage/group_server.py
+++ b/synapse/storage/group_server.py
@@ -35,7 +35,9 @@ class GroupServerStore(SQLBaseStore):
             keyvalues={
                 "group_id": group_id,
             },
-            retcols=("name", "short_description", "long_description", "avatar_url",),
+            retcols=(
+                "name", "short_description", "long_description", "avatar_url", "is_public"
+            ),
             allow_none=True,
             desc="is_user_in_group",
         )