diff --git a/moment-jdateformatparser.js b/moment-jdateformatparser.js
index a6140c0..25a91c8 100644
--- a/moment-jdateformatparser.js
+++ b/moment-jdateformatparser.js
@@ -157,7 +157,7 @@
     }
   }
 
-  if (typeof require !== 'undefined' && require !== null) {
+  if (typeof this.moment === 'undefined' && typeof require !== 'undefined' && require !== null) {
     if (typeof module !== 'undefined' && typeof module.exports !== 'undefined') { //Check if the environment is Node.js
       hookMoment(require('moment')); //if it is, we have to require it different (without the surrounding Array)
     } else {