diff --git a/lib/internal/util/comparisons.js b/lib/internal/util/comparisons.js
index b3256716c38b63..52cd11429e6ac6 100644
--- a/lib/internal/util/comparisons.js
+++ b/lib/internal/util/comparisons.js
@@ -59,7 +59,7 @@ function areSimilarFloatArrays(a, b) {
   if (a.byteLength !== b.byteLength) {
     return false;
   }
-  for (var offset = 0; offset < a.byteLength; offset++) {
+  for (let offset = 0; offset < a.byteLength; offset++) {
     if (a[offset] !== b[offset]) {
       return false;
     }