diff --git a/magnum/conductor/api.py b/magnum/conductor/api.py
index 556a30f0c..b1560ca5a 100644
--- a/magnum/conductor/api.py
+++ b/magnum/conductor/api.py
@@ -148,10 +148,11 @@ def object_action(self, context, objinst, objmethod, args, kwargs):
         return self._client.call(context, 'object_action', objinst=objinst,
                                  objmethod=objmethod, args=args, kwargs=kwargs)
 
-    def object_backport(self, context, objinst, target_version):
+    def object_backport_versions(self, context, objinst, object_versions):
         """Indirection API callback."""
-        return self._client.call(context, 'object_backport', objinst=objinst,
-                                 target_version=target_version)
+        return self._client.call(context, 'object_backport_versions',
+                                 objinst=objinst,
+                                 object_versions=object_versions)
 
     # NodeGroup Operations
 
diff --git a/magnum/conductor/handlers/indirection_api.py b/magnum/conductor/handlers/indirection_api.py
index c100a3db9..9d505331f 100644
--- a/magnum/conductor/handlers/indirection_api.py
+++ b/magnum/conductor/handlers/indirection_api.py
@@ -68,5 +68,7 @@ def object_action(self, context, objinst, objmethod, args, kwargs):
         updates['obj_what_changed'] = objinst.obj_what_changed()
         return updates, result
 
-    def object_backport(self, context, objinst, target_version):
-        return objinst.obj_to_primitive(target_version=target_version)
+    def object_backport_versions(self, context, objinst, object_versions):
+        target = object_versions[objinst.obj_name()]
+        return objinst.obj_to_primitive(target_version=target,
+                                        version_manifest=object_versions)
diff --git a/magnum/objects/base.py b/magnum/objects/base.py
index fb62ecedd..3571dfb7a 100644
--- a/magnum/objects/base.py
+++ b/magnum/objects/base.py
@@ -77,9 +77,9 @@ def object_action(self, context, objinst, objmethod, args, kwargs):
         return self._conductor.object_action(context, objinst, objmethod,
                                              args, kwargs)
 
-    def object_backport(self, context, objinst, target_version):
-        return self._conductor.object_backport(context, objinst,
-                                               target_version)
+    def object_backport_versions(self, context, objinst, object_versions):
+        return self._conductor.object_backport_versions(context, objinst,
+                                                        object_versions)
 
 
 class MagnumObjectSerializer(ovoo_base.VersionedObjectSerializer):
diff --git a/magnum/tests/unit/objects/test_objects.py b/magnum/tests/unit/objects/test_objects.py
index dd29ccb5d..58e5dc79a 100644
--- a/magnum/tests/unit/objects/test_objects.py
+++ b/magnum/tests/unit/objects/test_objects.py
@@ -410,9 +410,8 @@ def _test_deserialize_entity_newer(self, obj_version, backported_to,
                                        mock_indirection_api,
                                        my_version='1.6'):
         ser = base.MagnumObjectSerializer()
-        mock_indirection_api.object_backport_versions.side_effect \
-            = NotImplementedError()
-        mock_indirection_api.object_backport.return_value = 'backported'
+        mock_indirection_api.object_backport_versions.return_value = \
+            'backported'
 
         @base.MagnumObjectRegistry.register
         class MyTestObj(MyObj):
@@ -423,13 +422,11 @@ class MyTestObj(MyObj):
         primitive = obj.obj_to_primitive()
         result = ser.deserialize_entity(self.context, primitive)
         if backported_to is None:
-            self.assertEqual(
-                False,
-                mock_indirection_api.object_backport.called)
+            mock_indirection_api.object_backport_versions.assert_not_called()
         else:
             self.assertEqual('backported', result)
-            mock_indirection_api.object_backport.assert_called_with(
-                self.context, primitive, backported_to)
+            mock_indirection_api.object_backport_versions.assert_called_with(
+                self.context, primitive, {'MyTestObj': my_version})
 
     def test_deserialize_entity_newer_version_backports_level1(self):
         "Test object with unsupported (newer) version"