diff --git a/lib/dao.js b/lib/dao.js
index f5edfe13..9025cbf7 100644
--- a/lib/dao.js
+++ b/lib/dao.js
@@ -876,8 +876,9 @@ DataAccessObject.prototype.updateAttributes = function updateAttributes(data, cb
           var typedData = {};
 
           for (var key in data) {
+            // Convert the properties by type
             inst[key] = data[key];
-            typedData[key] = inst.__data[key];
+            typedData[key] = inst[key];
           }
 
           inst._adapter().updateAttributes(model, getIdValue(inst.constructor, inst), inst.constructor._forDB(typedData), function (err) {
@@ -886,7 +887,6 @@ DataAccessObject.prototype.updateAttributes = function updateAttributes(data, cb
               for (var key in data) {
                 inst.__dataWas[key] = inst.__data[key];
               }
-              ;
             }
             done.call(inst, function () {
               saveDone.call(inst, function () {
diff --git a/package.json b/package.json
index 495f0414..4d725ab8 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "loopback-datasource-juggler",
-  "version": "1.3.3",
+  "version": "1.3.4",
   "description": "LoopBack DataSoure Juggler",
   "keywords": [
     "StrongLoop",
diff --git a/test/loopback-dl.test.js b/test/loopback-dl.test.js
index 8be22fac..e826e188 100644
--- a/test/loopback-dl.test.js
+++ b/test/loopback-dl.test.js
@@ -486,6 +486,32 @@ describe('DataSource define model', function () {
 
   });
 
+  it('should update the instance with unknown properties', function (done) {
+    var ds = new DataSource('memory');// define models
+    Post = ds.define('Post', {
+      title: { type: String, length: 255, index: true },
+      content: { type: String }
+    });
+
+    Post.create({title: 'a', content: 'AAA'}, function (err, post) {
+      post.updateAttributes({title: 'b', xyz: 'xyz'}, function (err, p) {
+        should.not.exist(err);
+        p.id.should.be.equal(post.id);
+        p.content.should.be.equal(post.content);
+        p.xyz.should.be.equal('xyz');
+
+        Post.findById(post.id, function (err, p) {
+          p.id.should.be.equal(post.id);
+          p.content.should.be.equal(post.content);
+          p.xyz.should.be.equal('xyz');
+          p.title.should.be.equal('b');
+          done();
+        });
+      });
+
+    });
+  });
+
   it('injects id by default', function (done) {
     var ds = new ModelBuilder();