diff --git a/guidelines/terms/21/user-inactivity.html b/guidelines/terms/21/user-inactivity.html
index df98f1eb5c..96b4fecec9 100644
--- a/guidelines/terms/21/user-inactivity.html
+++ b/guidelines/terms/21/user-inactivity.html
@@ -1,5 +1,5 @@
 <dt><dfn id="dfn-user-inactivity">user inactivity</dfn></dt>
 <dd>
   <p>any continuous period of time where no user actions occur</p>
-	<p>The method of tracking will be determined by the web site or application.</p>
+	<p class="note">The method of tracking will be determined by the web site or application.</p>
 </dd>