diff --git a/src/v2/guide/components-custom-events.md b/src/v2/guide/components-custom-events.md
index cf60c428e8..20bd11ee4c 100644
--- a/src/v2/guide/components-custom-events.md
+++ b/src/v2/guide/components-custom-events.md
@@ -51,7 +51,7 @@ Vue.component('base-checkbox', {
 
 Now when using `v-model` on this component:
 
-```js
+```html
 <base-checkbox v-model="lovingVue"></base-checkbox>
 ```