diff --git a/src/librustdoc/html/static/.eslintrc.js b/src/librustdoc/html/static/.eslintrc.js
index ab0bff952285..bd83b254caac 100644
--- a/src/librustdoc/html/static/.eslintrc.js
+++ b/src/librustdoc/html/static/.eslintrc.js
@@ -77,5 +77,6 @@ module.exports = {
         "no-template-curly-in-string": "error",
         "block-scoped-var": "error",
         "guard-for-in": "error",
+        "no-alert": "error",
     }
 };