diff --git a/neutron_lib/objects/exceptions.py b/neutron_lib/objects/exceptions.py
index 5f17c3d98..32ec3d05a 100644
--- a/neutron_lib/objects/exceptions.py
+++ b/neutron_lib/objects/exceptions.py
@@ -60,3 +60,8 @@ class NeutronSyntheticFieldMultipleForeignKeys(exceptions.NeutronException):
 
 class NeutronSyntheticFieldsForeignKeysNotFound(exceptions.NeutronException):
     message = _("%(child)s does not define a foreign key for %(parent)s")
+
+
+class NeutronObjectValidatorException(exceptions.NeutronException):
+    message = _("Synthetic field(s) %(fields)s undefined, misspelled, or "
+                "otherwise invalid")