diff --git a/index.html b/index.html
index 4e2decf..f911962 100644
--- a/index.html
+++ b/index.html
@@ -376,6 +376,7 @@ <h3>
               readonly attribute unsigned short responseStatus;
               readonly attribute RenderBlockingStatusType renderBlockingStatus;
               readonly attribute DOMString contentType;
+              readonly attribute DOMString contentEncoding;
               [Default] object toJSON();
           };
         </pre>
@@ -709,6 +710,11 @@ <h3>
           <a data-for="PerformanceResourceTiming">resource info</a>'s
           [=response body info/content type=].
         </p>
+        <p data-dfn-for="PerformanceResourceTiming">
+          The <dfn>contentEncoding</dfn> getter steps are to return <a>this</a>'s
+          <a data-for="PerformanceResourceTiming">resource info</a>'s
+          [=response body info/content encoding=].
+        </p>
         <p data-dfn-for="PerformanceResourceTiming">
           The <dfn>renderBlockingStatus</dfn> getter steps are to return
           <a data-link-for="RenderBlockingStatusType">blocking</a> if