diff --git a/locale/fa/docs/guides/dont-block-the-event-loop.md b/locale/fa/docs/guides/dont-block-the-event-loop.md
index 9e3e2c79905e1..f4a21872b5b53 100644
--- a/locale/fa/docs/guides/dont-block-the-event-loop.md
+++ b/locale/fa/docs/guides/dont-block-the-event-loop.md
@@ -257,7 +257,7 @@ var niter = 20;
 
 var before, res, took;
 
-for (var i = 0; i < len; i++) {
+for (var i = 0; i < niter; i++) {
   obj = { obj1: obj, obj2: obj }; // Doubles in size each iter
 }
 
diff --git a/locale/zh-cn/docs/guides/dont-block-the-event-loop.md b/locale/zh-cn/docs/guides/dont-block-the-event-loop.md
index 6416eb443ec95..aef63ec7c16ee 100644
--- a/locale/zh-cn/docs/guides/dont-block-the-event-loop.md
+++ b/locale/zh-cn/docs/guides/dont-block-the-event-loop.md
@@ -258,7 +258,7 @@ var niter = 20;
 
 var before, res, took;
 
-for (var i = 0; i < len; i++) {
+for (var i = 0; i < niter; i++) {
   obj = { obj1: obj, obj2: obj }; // 每个循环里面将对象 size 加倍
 }