diff --git a/lib/nconf/stores/system.js b/lib/nconf/stores/system.js
index 3f4cb3b..57fd848 100644
--- a/lib/nconf/stores/system.js
+++ b/lib/nconf/stores/system.js
@@ -7,6 +7,7 @@
  */
  
 var util = require('util'),
+    optimist = require('optimist'),
     Memory = require('./memory').Memory;
  
 //
@@ -79,10 +80,10 @@ System.prototype.loadArgv = function () {
       argv;
   
   if (typeof this.argv === 'object') {
-    argv = require('optimist').options(this.argv).argv;
+    argv = optimist(process.argv.slice(2)).options(this.argv).argv;
   }
   else if (this.argv) {
-    argv = require('optimist').argv;
+    argv = optimist(process.argv.slice(2)).argv;
   }
   
   if (!argv) {
@@ -114,4 +115,5 @@ System.prototype.loadEnv = function () {
   });
     
   return this.store;
-};
\ No newline at end of file
+};
+