diff --git a/examples/sleepsort.js b/examples/sleepsort.js
index 6f0f9a32..024c25bd 100644
--- a/examples/sleepsort.js
+++ b/examples/sleepsort.js
@@ -15,11 +15,11 @@ function sleepSort(array, callback) {
     }
 }
 
-if ( system.args < 2 ) {
+if ( system.args.length < 2 ) {
     console.log("Usage: phantomjs sleepsort.js PUT YOUR INTEGERS HERE SEPARATED BY SPACES");
     phantom.exit(1);
 } else {
-    sleepSort(Array.prototype.slice.call(system.args, 1), function() {
+    sleepSort(system.args.slice(1), function() {
         phantom.exit();
     });
-}
\ No newline at end of file
+}