diff --git a/synapse/handlers/groups_local.py b/synapse/handlers/groups_local.py
index 7e5d3f148..0d3feacd4 100644
--- a/synapse/handlers/groups_local.py
+++ b/synapse/handlers/groups_local.py
@@ -383,11 +383,11 @@ class GroupsLocalHandler(object):
 
             defer.returnValue({"groups": result})
         else:
-            result = yield self.transport_client.get_publicised_groups_for_user(
-                get_domain_from_id(user_id), user_id
-            )
+            result = yield self.transport_client.bulk_get_publicised_groups(
+                get_domain_from_id(user_id), [user_id],
+            )["users"][user_id]
             # TODO: Verify attestations
-            defer.returnValue(result)
+            defer.returnValue({"groups": result})
 
     @defer.inlineCallbacks
     def bulk_get_publicised_groups(self, user_ids, proxy=True):