diff --git a/lib/model.js b/lib/model.js
index d9d65a09..6d6bc19b 100644
--- a/lib/model.js
+++ b/lib/model.js
@@ -418,6 +418,12 @@ ModelBaseClass.toString = function() {
  * @returns {Object} returns Plain JSON object
  */
 ModelBaseClass.prototype.toObject = function(onlySchema, removeHidden, removeProtected) {
+  if (typeof onlySchema === 'object' && onlySchema != null) {
+    var options = onlySchema;
+    onlySchema = options.onlySchema;
+    removeHidden = options.removeHidden;
+    removeProtected = options.removeProtected;
+  }
   if (onlySchema === undefined) {
     onlySchema = true;
   }
diff --git a/test/loopback-dl.test.js b/test/loopback-dl.test.js
index a59480d3..17757b47 100644
--- a/test/loopback-dl.test.js
+++ b/test/loopback-dl.test.js
@@ -133,8 +133,8 @@ describe('ModelBuilder', function() {
 
     // Predefined property bio should be kept
     user.toObject().should.have.property('bio', 'me');
-    user.toObject(true).should.have.property('bio', 'me');
-    user.toObject(false).should.have.property('bio', 'me');
+    user.toObject({onlySchema: true}).should.have.property('bio', 'me');
+    user.toObject({onlySchema: false}).should.have.property('bio', 'me');
 
     done(null, User);
   });