diff --git a/lib/nconf/provider.js b/lib/nconf/provider.js
index 797fff5..c331c73 100644
--- a/lib/nconf/provider.js
+++ b/lib/nconf/provider.js
@@ -29,13 +29,11 @@ var Provider = exports.Provider = function (options) {
 // Define wrapper functions for using basic stores
 // in this instance
 //
-Provider.prototype['argv'] = function(options, usage) {
-  return this.add('argv', options, usage);
-};
 
-['env'].forEach(function (type) {
-  Provider.prototype[type] = function (options) {
-    return this.add(type, options);
+['add', 'env'].forEach(function (type) {
+  Provider.prototype[type] = function () {
+    var args = [type].concat(Array.prototype.slice.call(arguments));
+    return this.add.apply(this, args);
   };
 });
 
@@ -60,13 +58,13 @@ Provider.prototype.file = function (key, options) {
       ? { file: options }
       : options;
   }
-  
+
   options.type = 'file';
   return this.add(key, options);
 };
 
 //
-// Define wrapper functions for using 
+// Define wrapper functions for using
 // overrides and defaults
 //
 ['defaults', 'overrides'].forEach(function (type) {
@@ -422,7 +420,7 @@ Provider.prototype.load = function (callback) {
 
 //
 // ### function save (callback)
-// #### @callback {function} **optional**  Continuation to respond to when 
+// #### @callback {function} **optional**  Continuation to respond to when
 // complete.
 // Instructs each provider to save.  If a callback is provided, we will attempt
 // asynchronous saves on the providers, falling back to synchronous saves if
@@ -468,18 +466,18 @@ Provider.prototype.save = function (value, callback) {
         if (err) {
           return next(err);
         }
-        
+
         if (typeof data == 'object' && data !== null) {
           memo.push(data);
         }
-        
+
         next(null, memo);
       });
-    } 
+    }
     else if (store.saveSync) {
       memo.push(store.saveSync());
     }
-    
+
     next(null, memo);
   }