diff --git a/docs/css.html b/docs/css.html
index f795602d87..12ca882db9 100644
--- a/docs/css.html
+++ b/docs/css.html
@@ -1906,14 +1906,14 @@ For example, <code><section></code> should be wrapped
 
           <p>Add classes to an <code>&lt;img&gt;</code> element to easily style images in any project. Rounded corners are not available in IE8.</p>
           <div class="bs-docs-example bs-docs-example-images">
-            <img data-src="holder.js/140x140" class="img-rounded">
-            <img data-src="holder.js/140x140" class="img-circle">
-            <img data-src="holder.js/140x140" class="img-thumbnail">
+            <img data-src="holder.js/140x140" class="img-rounded" alt="">
+            <img data-src="holder.js/140x140" class="img-circle" alt="">
+            <img data-src="holder.js/140x140" class="img-thumbnail" alt="">
           </div>
 <pre class="prettyprint linenums">
-&lt;img src="..." class="img-rounded"&gt;
-&lt;img src="..." class="img-circle"&gt;
-&lt;img src="..." class="img-thumbnail"&gt;
+&lt;img src="..." class="img-rounded" alt=""&gt;
+&lt;img src="..." class="img-circle" alt=""&gt;
+&lt;img src="..." class="img-thumbnail" alt=""&gt;
 </pre>
 
         </section>