--- a/html/DOM3-Events.html	Tue Apr 15 16:41:08 2014 -0700
+++ b/html/DOM3-Events.html	Tue Apr 15 17:05:58 2014 -0700
@@ -9479,6 +9479,14 @@
 
 							<dt>DOMString? dataArg</dt>
 							<dd><p>Specifies <a href="#widl-CompositionEvent-data"><code>CompositionEvent.data</code></a>.</p></dd>
+
+							<dt>DOMString? locale</dt>
+							<dd><p>Specifies the <code>locale</code> attribute of the CompositionEvent.
+								This attribute is not defined in DOM3, but will be included in the
+								[<a href="#references-UIEvents">UI Events</a>] specification.
+								User agents which do not support <code>locale</code> should ignore this parameter.
+								</p></dd>
+
 						</dl>
 					</dd>
 				</dl>