diff --git a/tools/doc/html.js b/tools/doc/html.js
index 43c95901f5a589..ed90bb89510a16 100644
--- a/tools/doc/html.js
+++ b/tools/doc/html.js
@@ -67,7 +67,7 @@ const gtocHTML = unified()
 const templatePath = path.join(docPath, 'template.html');
 const template = fs.readFileSync(templatePath, 'utf8');
 
-const wrapSections = (content) => {
+function wrapSections(content) {
   let firstTime = true;
   return content.toString()
     .replace(/<h2/g, (heading) => {
@@ -77,7 +77,7 @@ const wrapSections = (content) => {
       }
       return '</section><section>' + heading;
     }) + (firstTime ? '' : '</section>');
-};
+}
 
 function toHTML({ input, content, filename, nodeVersion, versions }) {
   filename = path.basename(filename, '.md');