diff --git a/lib/utils/utils.js b/lib/utils/utils.js
index 61a77a33..963be6b7 100644
--- a/lib/utils/utils.js
+++ b/lib/utils/utils.js
@@ -16,11 +16,11 @@
 var utils = exports;
 
 var assert = require('assert');
-var base58 = require('./base58');
-var BN = require('bn.js');
 var util = require('util');
 var fs = require('fs');
 var os = require('os');
+var BN = require('bn.js');
+var base58 = require('./base58');
 var Number, Math, Date;
 var lazy;
 
@@ -43,8 +43,14 @@ utils.global = (function() {
 
   if (typeof global !== 'undefined')
     return global;
+
+  assert(false, 'No global defined.');
 })();
 
+Number = utils.global.Number;
+Math = utils.global.Math;
+Date = utils.global.Date;
+
 /**
  * Whether we're in a browser or not.
  * @const {Boolean}
@@ -54,10 +60,6 @@ utils.isBrowser =
   (typeof process !== 'undefined' && process.browser)
   || typeof window !== 'undefined';
 
-Number = utils.global.Number;
-Math = utils.global.Math;
-Date = utils.global.Date;
-
 /**
  * The home directory.
  * @const {String}