diff --git a/nova/objects/base.py b/nova/objects/base.py
index 315ae30..dd0e72f 100644
--- a/nova/objects/base.py
+++ b/nova/objects/base.py
@@ -95,6 +95,9 @@ class NovaObject(ovoo_base.VersionedObject):
     OBJ_SERIAL_NAMESPACE = 'nova_object'
     OBJ_PROJECT_NAMESPACE = 'nova'

+    # Explain
+    obj_field_history = {}
+
     # NOTE(ndipanov): This is nova-specific
     @staticmethod
     def should_migrate_data():
@@ -139,6 +142,13 @@ class NovaObject(ovoo_base.VersionedObject):
         finally:
             self._context = original_context

+    def obj_make_compatible(self, primitive, target_version):
+        super(NovaObject, self).obj_make_compatible(primitive, target_version)
+        for field in self.fields:
+            added_in = self.obj_field_history.get(field, '1.0')
+            if target_version < added_in and field in primitive:
+                del primitive[field]
+

 class NovaPersistentObject(object):
     """Mixin class for Persistent objects.