diff --git a/source b/source
index 9d94eecd6dc..1344298127c 100644
--- a/source
+++ b/source
@@ -117337,6 +117337,9 @@ document.querySelector("button").addEventListener("click", bound);
    <li><p>Set <var>script</var>'s <span data-x="concept-script-settings-object">settings
    object</span> to <var>settings</var>.</p></li>
 
+   <li><p>Let <var>baseUrl</var> be <var>script</var>'s <span data-x="concept-script-base-url">base
+   URL</span>.
+
    <li><p>Set <var>script</var>'s <span data-x="concept-script-base-url">base URL</span> and
    <span data-x="concept-script-script-fetch-options">fetch options</span> to null.</p></li>
 
@@ -117344,7 +117347,8 @@ document.querySelector("button").addEventListener("click", bound);
    <span data-x="concept-script-error-to-rethrow">error to rethrow</span> to null.</p></li>
 
    <li><p>Let <var>sheet</var> be the result of running the steps to <span>create a constructed
-   <code>CSSStyleSheet</code></span> with an empty dictionary as the argument.</p></li>
+   <code>CSSStyleSheet</code></span> with: «[
+   "<code data-x="">baseUrl</code>" → <var>baseUrl</var> ]».</p></li>
 
    <li>
     <p>Run the steps to <span>synchronously replace the rules of a <code>CSSStyleSheet</code></span>