diff --git a/neutron/plugins/ml2/drivers/ovn/mech_driver/ovsdb/maintenance.py b/neutron/plugins/ml2/drivers/ovn/mech_driver/ovsdb/maintenance.py
index 614b76a60bf..ab93ea1092f 100644
--- a/neutron/plugins/ml2/drivers/ovn/mech_driver/ovsdb/maintenance.py
+++ b/neutron/plugins/ml2/drivers/ovn/mech_driver/ovsdb/maintenance.py
@@ -500,7 +500,7 @@ class DBInconsistenciesPeriodics(SchemaAwarePeriodicsBase):
             type_ = port.type.strip()
             if not port.port_security:
                 if not type_ and ovn_const.UNKNOWN_ADDR not in addresses:
-                    addresses = [ovn_const.UNKNOWN_ADDR]
+                    addresses.append(ovn_const.UNKNOWN_ADDR)
                 elif type_ and ovn_const.UNKNOWN_ADDR in addresses:
                     addresses.remove(ovn_const.UNKNOWN_ADDR)
             else:
diff --git a/neutron/plugins/ml2/drivers/ovn/mech_driver/ovsdb/ovn_client.py b/neutron/plugins/ml2/drivers/ovn/mech_driver/ovsdb/ovn_client.py
index 01e22427c0a..a7f3f54c63f 100644
--- a/neutron/plugins/ml2/drivers/ovn/mech_driver/ovsdb/ovn_client.py
+++ b/neutron/plugins/ml2/drivers/ovn/mech_driver/ovsdb/ovn_client.py
@@ -277,10 +277,7 @@ class OVNClient(object):
                 # OVN allows any mac address from a port if "unknown"
                 # is added to the Logical_Switch_Port.addresses column.
                 # So add it.
-                addresses = [ovn_const.UNKNOWN_ADDR]
-            else:
-                addresses = [address]
-                addresses.extend(new_macs)
+                addresses.append(ovn_const.UNKNOWN_ADDR)
 
         dhcpv4_options = self._get_port_dhcp_options(port, const.IP_VERSION_4)
         dhcpv6_options = self._get_port_dhcp_options(port, const.IP_VERSION_6)
diff --git a/neutron/tests/unit/plugins/ml2/drivers/ovn/mech_driver/test_mech_driver.py b/neutron/tests/unit/plugins/ml2/drivers/ovn/mech_driver/test_mech_driver.py
index 648ce93789e..22ef0629674 100644
--- a/neutron/tests/unit/plugins/ml2/drivers/ovn/mech_driver/test_mech_driver.py
+++ b/neutron/tests/unit/plugins/ml2/drivers/ovn/mech_driver/test_mech_driver.py
@@ -405,9 +405,8 @@ class TestOVNMechanismDriver(test_plugin.Ml2PluginV2TestCase):
                     self.assertEqual([],
                                      called_args_dict.get('port_security'))
 
-                    self.assertEqual(1, len(called_args_dict.get('addresses')))
                     self.assertEqual(ovn_const.UNKNOWN_ADDR,
-                                     called_args_dict.get('addresses')[0])
+                                     called_args_dict.get('addresses')[1])
                     data = {'port': {'mac_address': '00:00:00:00:00:01'}}
                     req = self.new_update_request(
                         'ports',
@@ -419,9 +418,9 @@ class TestOVNMechanismDriver(test_plugin.Ml2PluginV2TestCase):
                          ).call_args_list[0][1])
                     self.assertEqual([],
                                      called_args_dict.get('port_security'))
-                    self.assertEqual(1, len(called_args_dict.get('addresses')))
+                    self.assertEqual(2, len(called_args_dict.get('addresses')))
                     self.assertEqual(ovn_const.UNKNOWN_ADDR,
-                                     called_args_dict.get('addresses')[0])
+                                     called_args_dict.get('addresses')[1])
 
                     # Enable port security
                     data = {'port': {'port_security_enabled': 'True'}}