diff --git a/README.md b/README.md
index ec8680f..297ffc9 100644
--- a/README.md
+++ b/README.md
@@ -191,11 +191,12 @@ Responsible for loading the values parsed from `process.env` into the configurat
   var dbHost = nconf.get('database:host');
 
   //
-  // Or use both options
+  // Or use all options
   //
   nconf.env({
     separator: '__',
-    whitelist: ['database__host', 'only', 'load', 'these', 'values']
+    match: /^whatever_matches_this_will_be_whitelisted/
+    whitelist: ['database__host', 'only', 'load', 'these', 'values', 'if', 'whatever_doesnt_match_but_is_whitelisted_gets_loaded_too']
   });
   var dbHost = nconf.get('database:host');
 ```
diff --git a/lib/nconf/stores/env.js b/lib/nconf/stores/env.js
index e73026e..3d7a7f9 100644
--- a/lib/nconf/stores/env.js
+++ b/lib/nconf/stores/env.js
@@ -21,6 +21,7 @@ var Env = exports.Env = function (options) {
   options        = options || {};
   this.type      = 'env';
   this.readOnly  = true;
+  this.match = options.match
   this.whitelist = options.whitelist || [];
   this.separator = options.separator || '';
   if (options instanceof Array) {
@@ -52,7 +53,13 @@ Env.prototype.loadEnv = function () {
 
   this.readOnly = false;
   Object.keys(process.env).filter(function (key) {
-    return !self.whitelist.length || self.whitelist.indexOf(key) !== -1;
+    if(self.match && self.whitelist.length) {
+      return key.match(self.match) || self.whitelist.indexOf(key) !== -1
+    } else if (self.match) {
+      return key.match(self.match)
+    } else {
+      return !self.whitelist.length || self.whitelist.indexOf(key) !== -1
+    }
   }).forEach(function (key) {
     if (self.separator) {
       self.set(common.key.apply(common, key.split(self.separator)), process.env[key]);