diff --git a/nova/api/openstack/compute/quota_sets.py b/nova/api/openstack/compute/quota_sets.py
index bf5adaad98..e9d4a7e6c0 100644
--- a/nova/api/openstack/compute/quota_sets.py
+++ b/nova/api/openstack/compute/quota_sets.py
@@ -26,6 +26,7 @@ from nova.api.openstack.compute.schemas import quota_sets
 from nova.api.openstack import extensions
 from nova.api.openstack import wsgi
 from nova.api import validation
+import nova.conf
 from nova import exception
 from nova.i18n import _
 from nova import objects
@@ -33,6 +34,7 @@ from nova.policies import quota_sets as qs_policies
 from nova import quota
 
 
+CONF = nova.conf.CONF
 ALIAS = "os-quota-sets"
 QUOTAS = quota.QUOTAS
 
@@ -140,6 +142,15 @@ class QuotaSetsController(wsgi.Controller):
         user_id = params.get('user_id', [None])[0]
 
         quota_set = body['quota_set']
+
+        # NOTE(alex_xu): The CONF.enable_network_quota was deprecated due to
+        # it is only used by nova-network, and nova-network will be deprecated
+        # also. So when CONF.enable_newtork_quota is removed, the networks
+        # quota will disappeare also.
+        if not CONF.enable_network_quota and 'networks' in quota_set:
+            raise webob.exc.HTTPBadRequest(
+                explanation=_('The networks quota is disabled'))
+
         force_update = strutils.bool_from_string(quota_set.get('force',
                                                                'False'))
         settable_quotas = QUOTAS.get_settable_quotas(context, project_id,
diff --git a/nova/api/openstack/compute/schemas/quota_sets.py b/nova/api/openstack/compute/schemas/quota_sets.py
index f4ae63cf11..38a9f80e25 100644
--- a/nova/api/openstack/compute/schemas/quota_sets.py
+++ b/nova/api/openstack/compute/schemas/quota_sets.py
@@ -40,6 +40,7 @@ quota_resources = {
     'injected_file_path_bytes': common_quota,
     'server_groups': common_quota,
     'server_group_members': common_quota,
+    'networks': common_quota
 }
 
 update_quota_set = copy.deepcopy(quota_resources)
@@ -50,6 +51,7 @@ del update_quota_set_v236['fixed_ips']
 del update_quota_set_v236['floating_ips']
 del update_quota_set_v236['security_groups']
 del update_quota_set_v236['security_group_rules']
+del update_quota_set_v236['networks']
 
 update = {
     'type': 'object',
diff --git a/nova/tests/unit/api/openstack/compute/test_quotas.py b/nova/tests/unit/api/openstack/compute/test_quotas.py
index 317970d9d7..2c595fdfba 100644
--- a/nova/tests/unit/api/openstack/compute/test_quotas.py
+++ b/nova/tests/unit/api/openstack/compute/test_quotas.py
@@ -280,6 +280,19 @@ class QuotaSetsTestV21(BaseQuotaSetsTest):
         self.mox.VerifyAll()
         self.assertEqual(202, self.get_delete_status_int(res))
 
+    def test_update_network_quota_disabled(self):
+        self.flags(enable_network_quota=False)
+        self.assertRaises(webob.exc.HTTPBadRequest, self.controller.update,
+                          self._get_http_request(),
+                          1234, body={'quota_set': {'networks': 1}})
+
+    def test_update_network_quota_enabled(self):
+        self.flags(enable_network_quota=True)
+        tenant_networks._register_network_quota()
+        self.controller.update(self._get_http_request(),
+                               1234, body={'quota_set': {'networks': 1}})
+        del quota.QUOTAS._resources['networks']
+
 
 class ExtendedQuotasTestV21(BaseQuotaSetsTest):
     plugin = quotas_v21