diff --git a/packages/@vuepress/plugin-last-updated/index.js b/packages/@vuepress/plugin-last-updated/index.js
index cf307083ad..37e01045b9 100644
--- a/packages/@vuepress/plugin-last-updated/index.js
+++ b/packages/@vuepress/plugin-last-updated/index.js
@@ -10,6 +10,7 @@ module.exports = (options = {}, context) => ({
         ? transformer(timestamp, $lang)
         : defaultTransformer(timestamp, $lang)
       $page.lastUpdated = lastUpdated
+      $page.lastUpdatedTimestamp = timestamp
     }
   }
 })