diff --git a/source b/source
index bbfca484909..1947f928a45 100644
--- a/source
+++ b/source
@@ -2720,7 +2720,7 @@ a.setAttribute('href', 'https://example.com/'); // change the content attribute
     <ul class="brief">
      <li><dfn data-x-href="https://tc39.es/ecma262/#active-function-object">active function object</dfn></li>
      <li><dfn data-x-href="https://tc39.es/ecma262/#sec-agents">agent</dfn> and
-         <dfn data-x-href="https://tc39.es/ecma262/#sec-agent-clusters">agent cluster</dfn></li>
+         <dfn export data-x-href="https://tc39.es/ecma262/#sec-agent-clusters">agent cluster</dfn></li>
      <li><dfn data-x-href="https://tc39.es/ecma262/#sec-automatic-semicolon-insertion">automatic semicolon insertion</dfn></li>
      <li><dfn data-x-href="https://tc39.es/ecma262/#sec-candidate-executions">candidate execution</dfn></li>
      <li>The <dfn data-x-href="https://tc39.es/ecma262/#current-realm">current Realm Record</dfn></li>
@@ -78268,9 +78268,12 @@ console.assert(iframeWindow.frameElement === null);
   <span>cross-origin isolation mode</span>. It is initially "<code
   data-x="cross-origin-isolation-none">none</code>".</p>
 
-  <p>A <dfn>cross-origin isolation mode</dfn> is one of three possible values: "<dfn><code
-  data-x="cross-origin-isolation-none">none</code></dfn>", "<dfn><code
-  data-x="cross-origin-isolation-logical">logical</code></dfn>", or "<dfn><code
+  <p>A <dfn export>cross-origin isolation mode</dfn> is one of three possible values: "<dfn
+  export for="cross-origin isolation mode"><code
+  data-x="cross-origin-isolation-none">none</code></dfn>", "<dfn export
+  for="cross-origin isolation mode"><code
+  data-x="cross-origin-isolation-logical">logical</code></dfn>", or "<dfn export
+  for="cross-origin isolation mode"><code
   data-x="cross-origin-isolation-concrete">concrete</code></dfn>".</p>
 
   <div class="note">
@@ -87210,7 +87213,7 @@ interface <dfn>BeforeUnloadEvent</dfn> : <span>Event</span> {
 
   <div w-nodev>
 
-  <p>An <span>agent cluster</span> has an associated <dfn
+  <p>An <span>agent cluster</span> has an associated <dfn export
   data-x="agent-cluster-cross-origin-isolation">cross-origin isolation mode</dfn>, which is a
   <span>cross-origin isolation mode</span>. It is initially "<code
   data-x="cross-origin-isolation-none">none</code>".</p>