diff --git a/docs/_includes/css/forms.html b/docs/_includes/css/forms.html
index 2a1848e501..9680c6c910 100644
--- a/docs/_includes/css/forms.html
+++ b/docs/_includes/css/forms.html
@@ -95,6 +95,12 @@
     <label class="sr-only" for="exampleInputEmail2">Email address</label>
     <input type="email" class="form-control" id="exampleInputEmail2" placeholder="Enter email">
   </div>
+  <div class="form-group">
+    <div class="input-group">
+      <div class="input-group-addon">@</div>
+      <input class="form-control" type="email" placeholder="Enter email">
+    </div>
+  </div>
   <div class="form-group">
     <label class="sr-only" for="exampleInputPassword2">Password</label>
     <input type="password" class="form-control" id="exampleInputPassword2" placeholder="Password">