diff --git a/docs/en/essentials/history-mode.md b/docs/en/essentials/history-mode.md
index 536276a06..6b23ab58f 100644
--- a/docs/en/essentials/history-mode.md
+++ b/docs/en/essentials/history-mode.md
@@ -50,7 +50,7 @@ const httpPort = 80
 http.createServer((req, res) => {
   fs.readFile('index.htm', 'utf-8', (err, content) => {
     if (err) {
-      console.log('We cannot open 'index.htm' file.')
+      console.log('We cannot open "index.htm" file.')
     }
 
     res.writeHead(200, {