diff --git a/core/src/main/scala/spark/ui/UIUtils.scala b/core/src/main/scala/spark/ui/UIUtils.scala
index ed590693cc..80c0bebc66 100644
--- a/core/src/main/scala/spark/ui/UIUtils.scala
+++ b/core/src/main/scala/spark/ui/UIUtils.scala
@@ -66,7 +66,7 @@ private[spark] object UIUtils {
                 <div class="navbar-inner">
                   <div class="container">
                     <div class="brand"><img src="/static/spark-logo-77x50px-hd.png" /></div>
-                    <ul class="nav">
+                    <ul class="nav nav-pills">
                       {storage}
                       {jobs}
                       {environment}