diff --git a/lib/plugins/filter/meta_generator.js b/lib/plugins/filter/meta_generator.js
index 0f78e63918..1e5ee3bb33 100644
--- a/lib/plugins/filter/meta_generator.js
+++ b/lib/plugins/filter/meta_generator.js
@@ -1,14 +1,13 @@
 'use strict';
 
-const rMetaGenerator = /<meta\s+name=['|"]?generator['|"]?/i;
-const hexoGeneratorTag = '<meta name="generator" content="Hexo %s" />';
 let cheerio;
+const hexoGeneratorTag = '<meta name="generator" content="Hexo %s" />';
 
 function hexoMetaGeneratorInject(data) {
-  if (!rMetaGenerator.test(data)) {
-    if (!cheerio) cheerio = require('cheerio');
-    const $ = cheerio.load(data, {decodeEntities: false});
+  if (!cheerio) cheerio = require('cheerio');
+  const $ = cheerio.load(data, {decodeEntities: false});
 
+  if (!($('meta[name="generator"]').length > 0)) {
     $('head').prepend(hexoGeneratorTag.replace('%s', this.version));
 
     return $.html();