diff --git a/lib/child_process.js b/lib/child_process.js
index 7dc46289eb4..79fd8e7ffb4 100644
--- a/lib/child_process.js
+++ b/lib/child_process.js
@@ -12,11 +12,9 @@ var spawn = exports.spawn = function (path, args /*, options OR env, customFds *
 };
 
 exports.exec = function (command /*, options, callback */) {
-  if (arguments.length < 3) {
-    return exports.execFile("/bin/sh", ["-c", command], arguments[1]);
-  } else {
-    return exports.execFile("/bin/sh", ["-c", command], arguments[1], arguments[2]);
-  }
+  var _slice = Array.prototype.slice;
+  var args = ["/bin/sh", ["-c", command]].concat(_slice.call(arguments, 1));
+  return exports.execFile.apply(this, args)
 };