diff --git a/src/main/webapp/WEB-INF/tags/menu.tag b/src/main/webapp/WEB-INF/tags/menu.tag
index f7e8652..6afb0f3 100644
--- a/src/main/webapp/WEB-INF/tags/menu.tag
+++ b/src/main/webapp/WEB-INF/tags/menu.tag
@@ -8,14 +8,14 @@
<div class="container">
<div class="navbar-header">
<a class="navbar-brand" href="<spring:url value="/" htmlEscape="true" />"><span></span></a>
- <button type="button" class="navbar-toggle" data-toggle="collapse">
+ <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#main-navbar">
<span class="sr-only"><os-p>Toggle navigation</os-p></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
</div>
- <div class="navbar-collapse collapse">
+ <div class="navbar-collapse collapse" id="main-navbar">
<ul class="nav navbar-nav navbar-right">
<petclinic:menuItem active="${name eq 'home'}" url="/" title="home page">