diff --git a/nova/servicegroup/drivers/mc.py b/nova/servicegroup/drivers/mc.py
index d5d3d0832a39..5d62d9b75212 100644
--- a/nova/servicegroup/drivers/mc.py
+++ b/nova/servicegroup/drivers/mc.py
@@ -78,7 +78,11 @@ class MemcachedDriver(base.Driver):
             # Change mc time to offset-aware time
             updated_time_in_mc = \
                 updated_time_in_mc.replace(tzinfo=iso8601.iso8601.Utc())
-            if updated_time_in_db <= updated_time_in_mc:
+            # If [DEFAULT]/enable_new_services is set to be false, the
+            # ``updated_time_in_db`` will be None, in this case, use
+            # ``updated_time_in_mc`` instead.
+            if (not updated_time_in_db or
+                    updated_time_in_db <= updated_time_in_mc):
                 return updated_time_in_mc
 
         return updated_time_in_db
diff --git a/nova/tests/unit/servicegroup/test_mc_servicegroup.py b/nova/tests/unit/servicegroup/test_mc_servicegroup.py
index 6d432db49a85..67fcc0cb3513 100644
--- a/nova/tests/unit/servicegroup/test_mc_servicegroup.py
+++ b/nova/tests/unit/servicegroup/test_mc_servicegroup.py
@@ -74,16 +74,19 @@ class MemcachedServiceGroupTestCase(test.NoDBTestCase):
             'updated_at': updated_at_time.replace(tzinfo=iso8601.iso8601.Utc())
         }
 
+        # If no record returned from the mc, return record from DB
         self.mc_client.get.return_value = None
         self.assertEqual(service_ref['updated_at'],
                          self.servicegroup_api.get_updated_time(service_ref))
         self.mc_client.get.assert_called_once_with('compute:fake-host')
+        # If the record in mc is newer than DB, return record from mc
         self.mc_client.reset_mock()
         retval = timeutils.utcnow()
         self.mc_client.get.return_value = retval
         self.assertEqual(retval.replace(tzinfo=iso8601.iso8601.Utc()),
                          self.servicegroup_api.get_updated_time(service_ref))
         self.mc_client.get.assert_called_once_with('compute:fake-host')
+        # If the record in DB is newer than mc, return record from DB
         self.mc_client.reset_mock()
         service_ref['updated_at'] = \
             retval.replace(tzinfo=iso8601.iso8601.Utc())
@@ -91,3 +94,10 @@ class MemcachedServiceGroupTestCase(test.NoDBTestCase):
         self.assertEqual(service_ref['updated_at'],
                          self.servicegroup_api.get_updated_time(service_ref))
         self.mc_client.get.assert_called_once_with('compute:fake-host')
+        # If no record returned from the DB, return the record from mc
+        self.mc_client.reset_mock()
+        service_ref['updated_at'] = None
+        self.mc_client.get.return_value = updated_at_time
+        self.assertEqual(updated_at_time.replace(tzinfo=iso8601.iso8601.Utc()),
+                         self.servicegroup_api.get_updated_time(service_ref))
+        self.mc_client.get.assert_called_once_with('compute:fake-host')