1 files changed, 1 insertions, 0 deletions
diff --git a/benchmark/fs/readfile.js b/benchmark/fs/readfile.js
index ac3241901b..0f39f64f57 100644
--- a/benchmark/fs/readfile.js
+++ b/benchmark/fs/readfile.js
@@ -1,6 +1,7 @@
 // Call fs.readFile over and over again really fast.
 // Then see how many times it got called.
 // Yes, this is a silly benchmark.  Most benchmarks are silly.
+'use strict';
 
 var path = require('path');
 var common = require('../common.js');