diff --git a/lib/internal/stream_base_commons.js b/lib/internal/stream_base_commons.js
index eb2e53963d82b3..95430ff738fdb5 100644
--- a/lib/internal/stream_base_commons.js
+++ b/lib/internal/stream_base_commons.js
@@ -111,16 +111,15 @@ function createWriteWrap(handle) {
 function writevGeneric(self, data, cb) {
   const req = createWriteWrap(self[kHandle]);
   const allBuffers = data.allBuffers;
-  var chunks;
-  var i;
+  let chunks;
   if (allBuffers) {
     chunks = data;
-    for (i = 0; i < data.length; i++)
+    for (let i = 0; i < data.length; i++)
       data[i] = data[i].chunk;
   } else {
     chunks = new Array(data.length << 1);
-    for (i = 0; i < data.length; i++) {
-      var entry = data[i];
+    for (let i = 0; i < data.length; i++) {
+      const entry = data[i];
       chunks[i * 2] = entry.chunk;
       chunks[i * 2 + 1] = entry.encoding;
     }