diff --git a/src/angular-multi-select.js b/src/angular-multi-select.js
index <HASH>..<HASH> 100644
--- a/src/angular-multi-select.js
+++ b/src/angular-multi-select.js
@@ -210,7 +210,7 @@ angular_multi_select.directive('angularMultiSelect', [
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 				*/
-				amse.on_data_change(() => {
+				amse.on_data_change(function () {
 					/*
 					 * Will be triggered every time the internal model data is changed.
 					 * That could happen on check/uncheck, for example.
Do not use fat arrow functions when not required