diff --git a/lib/plugins.js b/lib/plugins.js
index 0fbefd20..5aedfc68 100644
--- a/lib/plugins.js
+++ b/lib/plugins.js
@@ -65,11 +65,11 @@ function loadPlugin(name, config) {
   if (typeof plugin.SUPPORTED_MODULES !== 'undefined') {
     if(plugin.SUPPORTED_MODULES === 'string')
       plugin.SUPPORTED_MODULES = [plugin.SUPPORTED_MODULES];
-
-    if(!(plugin.SUPPORTED_MODULES instanceof Array))
-      throw new Error('\'' + name + '\' fails to implement *required* \'SUPPORTED_MODULES\' constant');
   }
 
+  if(!(plugin.SUPPORTED_MODULES instanceof Array))
+    throw new Error('\'' + name + '\' fails to implement *required* \'SUPPORTED_MODULES\' constant');
+
   plugin.SUPPORTED_MODULES.forEach(function(moduleName) {
     moduleMethods[moduleName].forEach(function(methodName) {
       if (typeof plugin[methodName] !== 'function') {
@@ -113,7 +113,7 @@ exports.configure = function configure(config) {
 
   // [required] configure (or load) wallet
   var walletName = plugins.current.transfer;
-  var walletConfig = plugins.settings[walletName];
+  var walletConfig = plugins.settings[walletName] || {};
 
   if (walletPlugin) walletPlugin.config(walletConfig);
   else walletPlugin = loadPlugin(walletName, walletConfig);
@@ -122,7 +122,7 @@ exports.configure = function configure(config) {
   // [optional] configure (or load) trader
   var traderName = plugins.current.trade;
   if (traderName) { // traderPlugin may be disabled
-    var traderConfig = plugins.settings[traderName];
+    var traderConfig = plugins.settings[traderName] || {};
 
     if (traderPlugin) traderPlugin.config(traderConfig);
     else traderPlugin = loadPlugin(traderName, traderConfig);
@@ -132,7 +132,7 @@ exports.configure = function configure(config) {
   // [optional] ID Verifier
   var verifierName = plugins.current.idVerifier;
   if (verifierName) { // idVerifierPlugin may be disabled
-    var verifierConfig = plugins.settings[verifierName];
+    var verifierConfig = plugins.settings[verifierName] || {};
 
     if (idVerifierPlugin) idVerifierPlugin.config(verifierConfig);
     else loadPlugin(verifierName, verifierConfig);