diff --git a/nova/objects/migrate_data.py b/nova/objects/migrate_data.py
index a42d1dbc6c..bab85f4d2e 100644
--- a/nova/objects/migrate_data.py
+++ b/nova/objects/migrate_data.py
@@ -256,7 +256,8 @@ class LibvirtLiveMigrateData(LiveMigrateData):
     #               source_mdev_types and target_mdevs fields
     # Version 1.12: Added dst_cpu_shared_set_info
     # Version 1.13: Inherited pci_dev_map_src_dst from LiveMigrateData
-    VERSION = '1.13'
+    # Version 1.14: Added vtpm_secret_uuid and vtpm_secret_value
+    VERSION = '1.14'
 
     fields = {
         'filename': fields.StringField(),
@@ -295,12 +296,29 @@ class LibvirtLiveMigrateData(LiveMigrateData):
         # key is source mdev UUID and value is the destination mdev UUID.
         'target_mdevs': fields.DictOfStringsField(),
         'dst_cpu_shared_set_info': fields.SetOfIntegersField(),
+        'vtpm_secret_uuid': fields.UUIDField(nullable=True),
+        'vtpm_secret_value': fields.SensitiveStringField(nullable=True),
     }
 
     def obj_make_compatible(self, primitive, target_version):
         super(LibvirtLiveMigrateData, self).obj_make_compatible(
             primitive, target_version)
         target_version = versionutils.convert_version_to_tuple(target_version)
+        if (target_version < (1, 14)):
+            # In an object primitive, a field will be included if and only if
+            # it is set to something (including None, if the field is
+            # nullable). So instances with no vTPM will not have these fields
+            # set.
+            vtpm_fields = ['vtpm_secret_uuid', 'vtpm_secret_value']
+            if any(field in vtpm_fields for field in primitive):
+                # If either field is set, then we know this object was passed
+                # from newer compute which could support vTPM live migration.
+                # We raise here instead of silently removing the fields because
+                # we cannot backport the object to something compatible.
+                raise exception.ObjectActionError(
+                    action='obj_make_compatible',
+                    reason='Unable to backport newer vTPM support to '
+                           'requested version %d.%d' % target_version)
         if (target_version < (1, 13)):
             primitive.pop('pci_dev_map_src_dst', None)
         if (target_version < (1, 12)):
diff --git a/nova/tests/unit/objects/test_migrate_data.py b/nova/tests/unit/objects/test_migrate_data.py
index 14759a721d..830d0516ca 100644
--- a/nova/tests/unit/objects/test_migrate_data.py
+++ b/nova/tests/unit/objects/test_migrate_data.py
@@ -161,6 +161,18 @@ class _TestLibvirtLiveMigrateData(object):
         self.assertIn(
             'encryption_secret_uuid', primitive['nova_object.data'])
 
+    def test_vtpm_obj_make_compatible(self):
+        obj = migrate_data.LibvirtLiveMigrateData(
+            vtpm_secret_uuid=uuids.vtpm_secret,
+            vtpm_secret_value='password')
+        manifest = ovo_base.obj_tree_get_versions(obj.obj_name())
+        ex = self.assertRaises(
+            exception.ObjectActionError, obj.obj_to_primitive,
+            target_version='1.13', version_manifest=manifest)
+        self.assertIn(
+            'Unable to backport newer vTPM support to requested version '
+            '1.13', str(ex))
+
     def test_vif_migrate_data(self):
         source_vif = network_model.VIF(
             id=uuids.port_id,
diff --git a/nova/tests/unit/objects/test_objects.py b/nova/tests/unit/objects/test_objects.py
index 4a60fd4086..d96b372dac 100644
--- a/nova/tests/unit/objects/test_objects.py
+++ b/nova/tests/unit/objects/test_objects.py
@@ -1128,7 +1128,7 @@ object_data = {
     'KeyPair': '1.4-1244e8d1b103cc69d038ed78ab3a8cc6',
     'KeyPairList': '1.3-94aad3ac5c938eef4b5e83da0212f506',
     'LibvirtLiveMigrateBDMInfo': '1.1-5f4a68873560b6f834b74e7861d71aaf',
-    'LibvirtLiveMigrateData': '1.13-c92e9c98bfccafe84e52c08efbec41d8',
+    'LibvirtLiveMigrateData': '1.14-0d605656259dc382c242f7496419ca76',
     'LibvirtLiveMigrateNUMAInfo': '1.0-0e777677f3459d0ed1634eabbdb6c22f',
     'LibvirtVPMEMDevice': '1.0-17ffaf47585199eeb9a2b83d6bde069f',
     'MemoryDiagnostics': '1.0-2c995ae0f2223bb0f8e523c5cc0b83da',