diff --git a/neutron/common/legacy.py b/neutron/common/legacy.py
index 39bae31e313..cf37281a5d4 100644
--- a/neutron/common/legacy.py
+++ b/neutron/common/legacy.py
@@ -77,7 +77,6 @@ def modernize_quantum_config(config):
         'router_scheduler_driver',
         'rpc_backend',
         'service_plugins',
-        ('QUOTAS', 'quota_driver'),
         ('SECURITYGROUP', 'firewall_driver'),
     ]
 
diff --git a/neutron/manager.py b/neutron/manager.py
index 73e1d2ab05a..bf54716335a 100644
--- a/neutron/manager.py
+++ b/neutron/manager.py
@@ -18,6 +18,7 @@
 
 from oslo.config import cfg
 
+from neutron.common import legacy
 from neutron.common import utils
 from neutron.openstack.common import importutils
 from neutron.openstack.common import log as logging
@@ -115,6 +116,7 @@ def __init__(self, options=None, config_file=None):
         except ImportError:
             LOG.exception(_("Error loading plugin"))
             raise Exception(_("Plugin not found. "))
+        legacy.modernize_quantum_config(cfg.CONF)
         self.plugin = plugin_klass()
 
         msg = validate_post_plugin_load()
diff --git a/neutron/quota.py b/neutron/quota.py
index 67e4efdc734..fd8c3b34261 100644
--- a/neutron/quota.py
+++ b/neutron/quota.py
@@ -20,6 +20,7 @@
 import webob
 
 from neutron.common import exceptions
+from neutron.common import legacy
 from neutron.openstack.common import importutils
 from neutron.openstack.common import log as logging
 
@@ -51,6 +52,7 @@
 ]
 # Register the configuration options
 cfg.CONF.register_opts(quota_opts, 'QUOTAS')
+legacy.override_config(cfg.CONF, [('QUOTAS', 'quota_driver')])
 
 
 class ConfDriver(object):
diff --git a/neutron/services/loadbalancer/plugin.py b/neutron/services/loadbalancer/plugin.py
index a2d93017037..642b14dfa5d 100644
--- a/neutron/services/loadbalancer/plugin.py
+++ b/neutron/services/loadbalancer/plugin.py
@@ -17,6 +17,7 @@
 
 from oslo.config import cfg
 
+from neutron.common import legacy
 from neutron.db import api as qdbapi
 from neutron.db.loadbalancer import loadbalancer_db
 from neutron.openstack.common import importutils
@@ -35,6 +36,7 @@
 ]
 
 cfg.CONF.register_opts(lbaas_plugin_opts, "LBAAS")
+legacy.override_config(cfg.CONF, [('LBAAS', 'driver_fqn')])
 
 
 class LoadBalancerPlugin(loadbalancer_db.LoadBalancerPluginDb):