diff --git a/lib/fs.js b/lib/fs.js
index 816fbde0d2565f..30d2261215eedd 100644
--- a/lib/fs.js
+++ b/lib/fs.js
@@ -1894,15 +1894,14 @@ WriteStream.prototype._write = function(data, encoding, cb) {
       this._write(data, encoding, cb);
     });
 
-  var self = this;
-  fs.write(this.fd, data, 0, data.length, this.pos, function(er, bytes) {
+  fs.write(this.fd, data, 0, data.length, this.pos, (er, bytes) => {
     if (er) {
-      if (self.autoClose) {
-        self.destroy();
+      if (this.autoClose) {
+        this.destroy();
       }
       return cb(er);
     }
-    self.bytesWritten += bytes;
+    this.bytesWritten += bytes;
     cb();
   });