diff --git a/lib/dao.js b/lib/dao.js
index afb11518..6dccd9b7 100644
--- a/lib/dao.js
+++ b/lib/dao.js
@@ -316,7 +316,6 @@ DataAccessObject.updateOrCreate = DataAccessObject.upsert = function upsert(data
         // FIXME(bajtos) validate the model!
         // https://github.com/strongloop/loopback-datasource-juggler/issues/262
 
-        update = inst.toObject(true);
         update = removeUndefined(update);
         self.getDataSource().connector
           .updateOrCreate(Model.modelName, update, done);