diff --git a/integrations/my_autolink_headings.js b/integrations/my_autolink_headings.js
index c0355d1..de0db8a 100644
--- a/integrations/my_autolink_headings.js
+++ b/integrations/my_autolink_headings.js
@@ -7,10 +7,8 @@ import { matches } from 'hast-util-select';
 // Add IDs and SVG permalinks to headings
 // (rehype-autolink-headings is good, but can't be configured to ignore some headings)
 
-const anchor = fromHtmlIsomorphic(
-  '<a class="anchor" ariaHidden="true"><svg aria-hidden="true" tabindex="-1" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>',
-  { fragment: true },
-).children[0];
+const anchorHtml =
+  '<a class="anchor" ariaHidden="true"><svg aria-hidden="true" tabindex="-1" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>';
 
 // Should match the method in bin/build/checks/links.pl
 function slugIt(heading) {
@@ -28,16 +26,16 @@ function autoLinkHeadings(options) {
       if (!isElement(node, headings) || (exclude && matches(exclude, node))) {
         return CONTINUE;
       }
-      const newAnchor = structuredClone(anchor);
-      if (node.properties.id) {
-        const id = node.properties.id;
-        newAnchor.properties = { ...newAnchor.properties, href: '#' + id };
-      } else {
-        const id = slugIt(node);
-        newAnchor.properties = { ...newAnchor.properties, href: '#' + id };
-        node.properties.id = id;
+
+      if (!node.properties.id) {
+        node.properties.id = slugIt(node);
       }
-      node.children.unshift(newAnchor);
+      const id = node.properties.id;
+      const anchor = fromHtmlIsomorphic(anchorHtml, { fragment: true })
+        .children[0];
+      anchor.properties = { ...anchor.properties, href: '#' + id };
+
+      node.children.unshift(anchor);
       return SKIP;
     });
   };