diff --git a/benchmark/os/cpus.js b/benchmark/os/cpus.js
index 2a8535113c2..da158a1b061 100644
--- a/benchmark/os/cpus.js
+++ b/benchmark/os/cpus.js
@@ -7,9 +7,7 @@ const bench = common.createBenchmark(main, {
   n: [3e4]
 });
 
-function main(conf) {
-  const n = +conf.n;
-
+function main({ n }) {
   bench.start();
   for (var i = 0; i < n; ++i)
     cpus();
diff --git a/benchmark/os/loadavg.js b/benchmark/os/loadavg.js
index 6e3c57ed44b..2cd38316b24 100644
--- a/benchmark/os/loadavg.js
+++ b/benchmark/os/loadavg.js
@@ -7,9 +7,7 @@ const bench = common.createBenchmark(main, {
   n: [5e6]
 });
 
-function main(conf) {
-  const n = +conf.n;
-
+function main({ n }) {
   bench.start();
   for (var i = 0; i < n; ++i)
     loadavg();