diff --git a/lib/hexo/post.js b/lib/hexo/post.js
index 964cf56cda..37d3f5f676 100644
--- a/lib/hexo/post.js
+++ b/lib/hexo/post.js
@@ -135,10 +135,8 @@ class Post {
     const { tag } = this.context.extend;
 
     const scaffold = await this._getScaffold(data.layout);
-    let frontMatter = prepareFrontMatter({...data});
     const yfmSplit = yfm.split(scaffold);
-
-    frontMatter = await tag.render(yfmSplit.data, frontMatter);
+    const frontMatter = await tag.render(yfmSplit.data, prepareFrontMatter({...data}));
 
     const { separator } = yfmSplit;
     const jsonMode = separator[0] === ';';