diff --git a/types/lib/elements/custom-style.d.ts b/types/lib/elements/custom-style.d.ts
index 0ceeae111c..a0c19a23d1 100644
--- a/types/lib/elements/custom-style.d.ts
+++ b/types/lib/elements/custom-style.d.ts
@@ -34,12 +34,12 @@ declare namespace Polymer {
*
* For example:
*
- * ```
+ * ```html
*
- *
+ *
*
*
- * ...
+ *
*
*