diff --git a/index.html b/index.html
index 9c6c3c9..c64d731 100644
--- a/index.html
+++ b/index.html
@@ -826,7 +826,7 @@ <h2>
       <h2>
         <a>PushMessageData</a> interface
       </h2>
-      <dl title="interface PushMessageData" class="idl" data-merge="JSON">
+      <dl title="[Exposed=ServiceWorker] interface PushMessageData" class="idl" data-merge="JSON">
         <dt>
           ArrayBuffer arrayBuffer ()
         </dt>