diff --git a/nova/api/openstack/compute/extension_info.py b/nova/api/openstack/compute/extension_info.py
index 4aa812e213..619533b6f3 100644
--- a/nova/api/openstack/compute/extension_info.py
+++ b/nova/api/openstack/compute/extension_info.py
@@ -238,6 +238,9 @@ hardcoded_extensions = [
     {'name': 'ServerMetadata',
      'description': 'Server metadata Support.',
      'alias': 'server-metadata'},
+    {'name': 'SimpleTenantUsage',
+     'description': 'Simple tenant usage extension.',
+     'alias': 'os-simple-tenant-usage'}
 ]
 
 
diff --git a/nova/api/openstack/compute/routes.py b/nova/api/openstack/compute/routes.py
index ff33c955e0..d414f3970e 100644
--- a/nova/api/openstack/compute/routes.py
+++ b/nova/api/openstack/compute/routes.py
@@ -57,6 +57,7 @@ from nova.api.openstack.compute import server_metadata
 from nova.api.openstack.compute import server_usage
 from nova.api.openstack.compute import servers
 from nova.api.openstack.compute import shelve
+from nova.api.openstack.compute import simple_tenant_usage
 from nova.api.openstack.compute import suspend_server
 from nova.api.openstack import wsgi
 import nova.conf
@@ -188,6 +189,11 @@ server_controller = functools.partial(_create_controller,
 server_metadata_controller = functools.partial(_create_controller,
     server_metadata.ServerMetadataController, [], [])
 
+
+simple_tenant_usage_controller = functools.partial(_create_controller,
+    simple_tenant_usage.SimpleTenantUsageController, [], [])
+
+
 # NOTE(alex_xu): This is structure of this route list as below:
 # (
 #     ('Route path': {
@@ -315,6 +321,12 @@ ROUTE_LIST = (
         'GET': [keypairs_controller, 'show'],
         'DELETE': [keypairs_controller, 'delete']
     }),
+    ('/os-simple-tenant-usage', {
+        'GET': [simple_tenant_usage_controller, 'index']
+    }),
+    ('/os-simple-tenant-usage/{id}', {
+        'GET': [simple_tenant_usage_controller, 'show']
+    }),
     ('/os-volumes_boot', {
         'GET': [server_controller, 'index'],
         'POST': [server_controller, 'create']
diff --git a/nova/api/openstack/compute/simple_tenant_usage.py b/nova/api/openstack/compute/simple_tenant_usage.py
index 051ddb8d7b..b0a1701ba7 100644
--- a/nova/api/openstack/compute/simple_tenant_usage.py
+++ b/nova/api/openstack/compute/simple_tenant_usage.py
@@ -33,7 +33,6 @@ from nova import objects
 from nova.policies import simple_tenant_usage as stu_policies
 
 CONF = nova.conf.CONF
-ALIAS = "os-simple-tenant-usage"
 
 
 def parse_strtime(dstr, fmt):
@@ -364,23 +363,3 @@ class SimpleTenantUsageController(wsgi.Controller):
                 tenant_usage['tenant_usage_links'] = usages_links
 
         return tenant_usage
-
-
-class SimpleTenantUsage(extensions.V21APIExtensionBase):
-    """Simple tenant usage extension."""
-
-    name = "SimpleTenantUsage"
-    alias = ALIAS
-    version = 1
-
-    def get_resources(self):
-        resources = []
-
-        res = extensions.ResourceExtension(ALIAS,
-                                           SimpleTenantUsageController())
-        resources.append(res)
-
-        return resources
-
-    def get_controller_extensions(self):
-        return []
diff --git a/setup.cfg b/setup.cfg
index ac93d64b3b..99e68cd1c4 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -106,7 +106,6 @@ nova.api.v21.extensions =
     server_tags = nova.api.openstack.compute.server_tags:ServerTags
     server_groups = nova.api.openstack.compute.server_groups:ServerGroups
     services = nova.api.openstack.compute.services:Services
-    simple_tenant_usage = nova.api.openstack.compute.simple_tenant_usage:SimpleTenantUsage
     tenant_networks = nova.api.openstack.compute.tenant_networks:TenantNetworks
     used_limits = nova.api.openstack.compute.used_limits:UsedLimits
     user_data = nova.api.openstack.compute.user_data:UserData