diff --git a/README.md b/README.md
index 756ce45..98b0739 100644
--- a/README.md
+++ b/README.md
@@ -142,6 +142,12 @@ React.render(<Rcslider />, container);
           <td>''</td>
           <td>Set the animation for tooltip if it shows.</td>
         </tr>
+        <tr>
+          <td>withDots</td>
+          <td>bool</td>
+          <td>false</td>
+          <td>For linear slider, when the `step` value is greater than 1, you can set the `withDots` to  `true` if you want to render the slider bar with dots.</td>
+        </tr>
     </tbody>
 </table>
 
diff --git a/examples/simple.js b/examples/simple.js
index af1c84f..a375adf 100644
--- a/examples/simple.js
+++ b/examples/simple.js
@@ -10,5 +10,6 @@ function onChange(v){
 }
 
 // React.render(<div style={{width:400,margin:100}}><Slider marks={["一","二","三","四","五"]} defaultIndex={2} /></div>, document.getElementById('__react-content'));
+// React.render(<div style={{width:400,margin:100}}><Slider withDots className='rc-slider' step={20}/></div>, document.getElementById('__react-content'));
 // React.render(<div style={{width:400,margin:100}}><Slider className='rc-slider' step={20}/></div>, document.getElementById('__react-content'));
 React.render(<div style={{width:400,margin:100}}><Slider onChange={onChange}  tipTransitionName='rc-slider-tooltip-zoom-down'/></div>, document.getElementById('__react-content'));
diff --git a/tests/index.spec.js b/tests/index.spec.js
index 1e44888..1ea2b4a 100644
--- a/tests/index.spec.js
+++ b/tests/index.spec.js
@@ -39,8 +39,14 @@ describe('rc-slider', function () {
     expect(node.find('.rc-slider').length).to.be(1);
     expect(node.find('.rc-slider-handle').length).to.be(1);
     expect(node.find('.rc-slider-track').length).to.be(1);
-    expect(node.find('.rc-slider-dot').length).to.be(6);
     expect(slider.state.value).to.be(0);
+
+    var sliderWithDots = React.render(
+      <Slider className='rc-slider' step={20} withDots/>,
+      div
+    );
+    var node1 = $(div);
+    expect(node1.find('.rc-slider-dot').length).to.be(6);
   });
 
   it('should render a slider with marks correctly!', function () {
@@ -64,7 +70,7 @@ describe('rc-slider', function () {
   //     div
   //   );
   //   var selectedStep = slider.refs.step3.getDOMNode();
-    
+
   //   Simulate.mouseDown(selectedStep);
 
   //   setTimeout( function() {