diff --git a/docs/USING_PRO.md b/docs/USING_PRO.md
index 792460d34f..1e9176e15d 100644
--- a/docs/USING_PRO.md
+++ b/docs/USING_PRO.md
@@ -68,7 +68,7 @@ import { marked } from 'marked';
 
 // Override function
 const renderer = {
-  heading({ text, depth }) {
+  heading(text, depth) {
     const escapedText = text.toLowerCase().replace(/[^\w]+/g, '-');
 
     return `