diff --git a/src/mfm/syntax-highlight.ts b/src/mfm/syntax-highlight.ts
index 72913f0ad..109923fb7 100644
--- a/src/mfm/syntax-highlight.ts
+++ b/src/mfm/syntax-highlight.ts
@@ -307,7 +307,7 @@ const elements: Element[] = [
 	}
 ];
 
-// specify lang is todo
+// TODO: specify lang
 export default (source: string, lang?: string): string => {
 	let code = source;
 	let html = '';