diff --git a/vmware_nsx/extensions/dns_search_domain.py b/vmware_nsx/extensions/dns_search_domain.py
index 090a999812..0ef741a575 100644
--- a/vmware_nsx/extensions/dns_search_domain.py
+++ b/vmware_nsx/extensions/dns_search_domain.py
@@ -64,7 +64,7 @@ def _validate_dns_search_domain(data, max_len=attributes.NAME_MAX_LEN):
         return msg
 
 
-validators.validators['type:dns_search_domain'] = (_validate_dns_search_domain)
+validators.add_validator('dns_search_domain', _validate_dns_search_domain)
 
 
 DNS_SEARCH_DOMAIN = 'dns_search_domain'
diff --git a/vmware_nsx/extensions/networkgw.py b/vmware_nsx/extensions/networkgw.py
index 01f42db741..e5b2e0a4c0 100644
--- a/vmware_nsx/extensions/networkgw.py
+++ b/vmware_nsx/extensions/networkgw.py
@@ -151,8 +151,8 @@ nw_gw_quota_opts = [
 
 cfg.CONF.register_opts(nw_gw_quota_opts, 'QUOTAS')
 
-validators.validators['type:device_list'] = _validate_device_list
-validators.validators['type:connector_type'] = _validate_connector_type
+validators.add_validator('device_list', _validate_device_list)
+validators.add_validator('connector_type', _validate_connector_type)
 
 
 class Networkgw(extensions.ExtensionDescriptor):
diff --git a/vmware_nsx/plugins/nsx_v3/plugin.py b/vmware_nsx/plugins/nsx_v3/plugin.py
index 449bc894ff..92af31630d 100644
--- a/vmware_nsx/plugins/nsx_v3/plugin.py
+++ b/vmware_nsx/plugins/nsx_v3/plugin.py
@@ -2623,7 +2623,7 @@ class NsxV3Plugin(agentschedulers_db.AZDhcpAgentSchedulerDbMixin,
         if cfg.CONF.api_replay_mode:
             def _pass(data, _dummy=None):
                 pass
-            ext_sg.validators.validators['type:name_not_default'] = _pass
+            validators.add_validator('name_not_default', _pass)
 
     def get_security_groups(self, context, filters=None, fields=None,
                             sorts=None, limit=None,