diff --git a/mongoengine/errors.py b/mongoengine/errors.py
index 9852f2a1..b76243d3 100644
--- a/mongoengine/errors.py
+++ b/mongoengine/errors.py
@@ -12,6 +12,7 @@ __all__ = (
     "InvalidQueryError",
     "OperationError",
     "NotUniqueError",
+    "BulkWriteError",
     "FieldDoesNotExist",
     "ValidationError",
     "SaveConditionError",
@@ -51,6 +52,10 @@ class NotUniqueError(OperationError):
     pass
 
 
+class BulkWriteError(OperationError):
+    pass
+
+
 class SaveConditionError(OperationError):
     pass
 
diff --git a/mongoengine/queryset/base.py b/mongoengine/queryset/base.py
index 46b20d78..6d3fb41a 100644
--- a/mongoengine/queryset/base.py
+++ b/mongoengine/queryset/base.py
@@ -20,6 +20,7 @@ from mongoengine.common import _import_class
 from mongoengine.connection import get_db
 from mongoengine.context_managers import set_write_concern, switch_db
 from mongoengine.errors import (
+    BulkWriteError,
     InvalidQueryError,
     LookUpError,
     NotUniqueError,
@@ -356,7 +357,7 @@ class BaseQuerySet(object):
             # inserting documents that already have an _id field will
             # give huge performance debt or raise
             message = u"Bulk write error: (%s)"
-            raise NotUniqueError(message % six.text_type(err.details))
+            raise BulkWriteError(message % six.text_type(err.details))
         except pymongo.errors.OperationFailure as err:
             message = "Could not save document (%s)"
             if re.match("^E1100[01] duplicate key", six.text_type(err)):