diff --git a/synapse/app/user_dir.py b/synapse/app/user_dir.py
index 9d8edaa8e3..6d2aebe8de 100644
--- a/synapse/app/user_dir.py
+++ b/synapse/app/user_dir.py
@@ -25,8 +25,8 @@ from synapse.http.site import SynapseSite
 from synapse.http.server import JsonResource
 from synapse.metrics.resource import MetricsResource, METRICS_PREFIX
 from synapse.replication.slave.storage._base import BaseSlavedStore
-from synapse.replication.slave.storage.events import SlavedEventStore
 from synapse.replication.slave.storage.appservice import SlavedApplicationServiceStore
+from synapse.replication.slave.storage.events import SlavedEventStore
 from synapse.replication.slave.storage.registration import SlavedRegistrationStore
 from synapse.replication.tcp.client import ReplicationClientHandler
 from synapse.rest.client.v2_alpha import user_directory
diff --git a/synapse/replication/slave/storage/appservice.py b/synapse/replication/slave/storage/appservice.py
index a374f2f1a2..73048327c5 100644
--- a/synapse/replication/slave/storage/appservice.py
+++ b/synapse/replication/slave/storage/appservice.py
@@ -38,3 +38,6 @@ class SlavedApplicationServiceStore(BaseSlavedStore):
     get_appservice_state = DataStore.get_appservice_state.__func__
     set_appservice_last_pos = DataStore.set_appservice_last_pos.__func__
     set_appservice_state = DataStore.set_appservice_state.__func__
+    get_if_app_services_interested_in_user = (
+        DataStore.get_if_app_services_interested_in_user.__func__
+    )