diff --git a/lib/dao.js b/lib/dao.js
index 27688a57..9828cb3b 100644
--- a/lib/dao.js
+++ b/lib/dao.js
@@ -231,7 +231,8 @@ DataAccessObject.create = function (data, callback) {
       obj.trigger('save', function (saveDone) {
         var _idName = idName(Model);
         var modelName = Model.modelName;
-        this._adapter().create(modelName, this.constructor._forDB(obj.toObject(true)), function (err, id, rev) {
+        var val = removeUndefined(obj.toObject(true));
+        this._adapter().create(modelName, this.constructor._forDB(val), function (err, id, rev) {
           if (id) {
             obj.__data[_idName] = id;
             defineReadonlyProp(obj, _idName, id);