diff --git a/lib/js/src/manager/screen/utils/_PresentAlertOperation.js b/lib/js/src/manager/screen/utils/_PresentAlertOperation.js
index 0a7fd476..939b2b42 100644
--- a/lib/js/src/manager/screen/utils/_PresentAlertOperation.js
+++ b/lib/js/src/manager/screen/utils/_PresentAlertOperation.js
@@ -304,7 +304,7 @@ class _PresentAlertOperation extends _Task {
 
         if (this._alertView.getSoftButtons() !== null) {
             const softButtons = [];
-            for (let index = 0; index < this._alertView.getSoftButtons().length; index++) {
+            for (let index = 0; index < this._getSoftButtonCount(); index++) {
                 softButtons.push(this._alertView.getSoftButtons()[index].getCurrentStateSoftButton());
             }
             alert.setSoftButtons(softButtons);