--- a/midi/specification.html	Thu Dec 13 11:32:53 2012 -0800
+++ b/midi/specification.html	Thu Dec 13 13:15:57 2012 -0800
@@ -478,7 +478,7 @@
         </dd>
       </dl>
 
-      <dl title="interface MIDIPort"
+      <dl title="interface MIDIPort : EventTarget"
           class="idl">
         <dt>readonly attribute DOMString id</dt>
         <dd>
@@ -529,12 +529,10 @@
 
       <section>
         <h3 id="MIDIInput"><a>MIDIInput</a> Interface</h3>
-      <div class="idl" title="MIDIInput implements MIDIPort"></div>
 
-          <dl title="interface MIDIInput : EventTarget"
+          <dl title="interface MIDIInput : MIDIPort"
             class="idl">
-          <dt class="no-docs">[TreatNonCallableAsNull] attribute
-                              callback? onmessage</dt>
+          <dt>attribute EventHandler onmessage</dt>
           <dd>
             <p>
               This event handler, of type <code><a href=
@@ -581,9 +579,7 @@
       <section>
         <h3 id="MIDIOutput"><a>MIDIOutput</a> Interface</h3>
 
-      <div class="idl" title="MIDIOutput implements MIDIPort"></div>
-
-        <dl title="interface MIDIOutput"
+        <dl title="interface MIDIOutput : MIDIPort"
             class="idl">
           <dt>void send( sequence data, optional DOMHighResTimeStamp? timestamp )</dt>
           <dd>