diff --git a/index.js b/index.js
index <HASH>..<HASH> 100644
--- a/index.js
+++ b/index.js
@@ -1,5 +1,9 @@
 'use strict';
 
+function TrimpException (message) {
+    this.message = message;
+}
+
 function Trimp (config) {
     function calculate () {
     }
added TrimpException to be used later