diff --git a/docs/USING_ADVANCED.md b/docs/USING_ADVANCED.md
index c3797bcf30..4d3d7e2ad8 100644
--- a/docs/USING_ADVANCED.md
+++ b/docs/USING_ADVANCED.md
@@ -139,7 +139,7 @@ var markedTimeout = setTimeout(() => {
 markedWorker.onmessage = (html) => {
   clearTimeout(markedTimeout);
   console.log(html);
-});
+};
 
 markedWorker.postMessage(markdownString);
 </script>