diff --git a/src/d3.js b/src/d3.js
index 769aa32fef..697edcf2c2 100644
--- a/src/d3.js
+++ b/src/d3.js
@@ -2,7 +2,7 @@
 //log.debug('Setting up d3');
 var d3;
 
-if (require) {
+if (typeof require!=='undefined') {
   try {
     d3 = require('d3');
   } catch (e) {
@@ -491,4 +491,4 @@ module.exports = d3;
     }
 
 })();
-/* jshint ignore:end */
\ No newline at end of file
+/* jshint ignore:end */