diff --git a/lib/plugins/filter/meta_generator.js b/lib/plugins/filter/meta_generator.js
index 436db0be52..fd7b0c453b 100644
--- a/lib/plugins/filter/meta_generator.js
+++ b/lib/plugins/filter/meta_generator.js
@@ -4,13 +4,14 @@ let cheerio;
 const hexoGeneratorTag = '<meta name="generator" content="Hexo %s" />';
 
 function hexoMetaGeneratorInject(data) {
+  const { config } = this;
+  if (!config.meta_generator) return;
+
   if (!cheerio) cheerio = require('cheerio');
   const $ = cheerio.load(data, {decodeEntities: false});
-  const { config } = this;
 
   if (!($('meta[name="generator"]').length > 0) &&
-  $('head').contents().length > 0 &&
-  config.meta_generator) {
+  $('head').contents().length > 0) {
     $('head').prepend(hexoGeneratorTag.replace('%s', this.version));
 
     return $.html();