diff --git a/benchmark/common.js b/benchmark/common.js
index adc04a0b8082f9..495d6fdf365871 100644
--- a/benchmark/common.js
+++ b/benchmark/common.js
@@ -137,7 +137,8 @@ Benchmark.prototype._run = function() {
     }
 
     const child = child_process.fork(require.main.filename, childArgs, {
-      env: childEnv
+      env: childEnv,
+      execArgv: ['--expose_internals'].concat(process.execArgv)
     });
     child.on('message', sendResult);
     child.on('close', function(code) {
diff --git a/benchmark/misc/freelist.js b/benchmark/misc/freelist.js
index 7956dc3d6b18c0..868d42753ae6d1 100644
--- a/benchmark/misc/freelist.js
+++ b/benchmark/misc/freelist.js
@@ -1,13 +1,13 @@
 'use strict';
 
 var common = require('../common.js');
-var FreeList = require('internal/freelist').FreeList;
 
 var bench = common.createBenchmark(main, {
   n: [100000]
 });
 
 function main(conf) {
+  const FreeList = require('internal/freelist').FreeList;
   var n = conf.n;
   var poolSize = 1000;
   var list = new FreeList('test', poolSize, Object);