diff --git a/src/main/ui/static/merchantapplication/merchant_application.js b/src/main/ui/static/merchantapplication/merchant_application.js
index 7baa99e54..54b5007e4 100644
--- a/src/main/ui/static/merchantapplication/merchant_application.js
+++ b/src/main/ui/static/merchantapplication/merchant_application.js
@@ -342,7 +342,7 @@ angular.module('applyPartnerApp', ['ngMessages']).controller('applyPartnerCtrl',
             return;
         }
         if ($scope.partner.client_pay_type.indexOf('1') >= 0 && $scope.partner.client_pay_type.indexOf('2') >= 0) {
-            if (!$scope.partner.client_pay_desc instanceof Array) {
+            if (!($scope.partner.client_pay_desc instanceof Array)) {
                 $scope.partner.client_pay_desc = $scope.partner.client_pay_desc.split(',');
             }
             var fristDesc = $scope.partner.client_pay_desc[0];