diff --git a/bench/util/benchwarmer.js b/bench/util/benchwarmer.js
index 78b1a347..49f66f73 100644
--- a/bench/util/benchwarmer.js
+++ b/bench/util/benchwarmer.js
@@ -11,7 +11,7 @@ function BenchWarmer() {
   this.errors = {};
 }
 
-var print = require('sys').print;
+var print = require('util').print;
 
 BenchWarmer.prototype = {
   winners: function(benches) {