diff --git a/source b/source
index 786daa581b9..08abdc4bdbe 100644
--- a/source
+++ b/source
@@ -8251,7 +8251,7 @@ interface <dfn interface>DOMStringList</dfn> {
 
        <li><p>Set <var>serialized</var> to { [[Type]]: "SharedArrayBuffer", [[ArrayBufferData]]:
        <var>value</var>.[[ArrayBufferData]], [[ArrayBufferByteLength]]: <var>size</var>,
-       [[AgentCluster]]: <var>agentCluster</var> }.</p></li>
+       [[AgentCluster]]: the <span>surrounding agent</span>'s <span>agent cluster</span> }.</p></li>
       </ol>
      </li>