diff --git a/components/doc/tristatecheckbox/validationdoc.js b/components/doc/tristatecheckbox/validationdoc.js
index 54c7bcb409..aba65bd06b 100644
--- a/components/doc/tristatecheckbox/validationdoc.js
+++ b/components/doc/tristatecheckbox/validationdoc.js
@@ -152,7 +152,7 @@ export default function InvalidDemo() {
-
+
>
);
}