diff --git a/mongoengine/errors.py b/mongoengine/errors.py
index 2c5c2946..15830b5c 100644
--- a/mongoengine/errors.py
+++ b/mongoengine/errors.py
@@ -6,7 +6,7 @@ from mongoengine.python_support import txt_type
 __all__ = ('NotRegistered', 'InvalidDocumentError', 'LookUpError',
            'DoesNotExist', 'MultipleObjectsReturned', 'InvalidQueryError',
            'OperationError', 'NotUniqueError', 'FieldDoesNotExist',
-           'ValidationError')
+           'ValidationError', 'SaveConditionError')
 
 
 class NotRegistered(Exception):