diff --git a/mongoengine/fields.py b/mongoengine/fields.py
index f658b107..7942e5eb 100644
--- a/mongoengine/fields.py
+++ b/mongoengine/fields.py
@@ -8,7 +8,7 @@ import pymongo
 import pymongo.dbref
 import pymongo.son
 import pymongo.binary
-import datetime
+import datetime, time
 import decimal
 import gridfs
 import warnings