diff --git a/helpdesk/migrations/0009_migrate_queuemembership.py b/helpdesk/migrations/0009_migrate_queuemembership.py
index 318b24ab..0b88bdee 100644
--- a/helpdesk/migrations/0009_migrate_queuemembership.py
+++ b/helpdesk/migrations/0009_migrate_queuemembership.py
@@ -6,6 +6,7 @@ from django.utils.translation import gettext_lazy as _
 
 
 def create_and_assign_permissions(apps, schema_editor):
+    db_alias = schema_editor.connection.alias
     Permission = apps.get_model('auth', 'Permission')
     ContentType = apps.get_model('contenttypes', 'ContentType')
     # Two steps:
@@ -14,8 +15,7 @@ def create_and_assign_permissions(apps, schema_editor):
 
     # First step: prepare the permission for each queue
     Queue = apps.get_model('helpdesk', 'Queue')
-
-    for q in Queue.objects.all():
+    for q in Queue.objects.using(db_alias).all():
         if not q.permission_name:
             basename = "queue_access_%s" % q.slug
             q.permission_name = "helpdesk.%s" % basename
@@ -24,9 +24,9 @@ def create_and_assign_permissions(apps, schema_editor):
             basename = q.permission_name[9:]
 
         try:
-            Permission.objects.create(
+            Permission.objects.using(db_alias).create(
                 name=_("Permission for queue: ") + q.title,
-                content_type=ContentType.objects.get(model="queue"),
+                content_type=ContentType.objects.using(db_alias).get(model="queue"),
                 codename=basename,
             )
         except IntegrityError:
@@ -36,29 +36,30 @@ def create_and_assign_permissions(apps, schema_editor):
 
     # Second step: map the permissions according to QueueMembership
     QueueMembership = apps.get_model('helpdesk', 'QueueMembership')
-    for qm in QueueMembership.objects.all():
+    for qm in QueueMembership.objects.using(db_alias).all():
         user = qm.user
         for q in qm.queues.all():
             # Strip the `helpdesk.` prefix
-            p = Permission.objects.get(codename=q.permission_name[9:])
+            p = Permission.objects.using(db_alias).get(codename=q.permission_name[9:])
             user.user_permissions.add(p)
         qm.delete()
 
 
 def revert_queue_membership(apps, schema_editor):
+    db_alias = schema_editor.connection.alias
     Permission = apps.get_model('auth', 'Permission')
     Queue = apps.get_model('helpdesk', 'Queue')
     QueueMembership = apps.get_model('helpdesk', 'QueueMembership')
-    for p in Permission.objects.all():
+    for p in Permission.objects.using(db_alias).all():
         if p.codename.startswith("queue_access_"):
             slug = p.codename[13:]
             try:
-                q = Queue.objects.get(slug=slug)
+                q = Queue.objects.using(db_alias).get(slug=slug)
             except ObjectDoesNotExist:
                 continue
 
             for user in p.user_set.all():
-                qm, _ = QueueMembership.objects.get_or_create(user=user)
+                qm, _ = QueueMembership.objects.using(db_alias).get_or_create(user=user)
                 qm.queues.add(q)
 
             p.delete()