diff --git a/commerce_pdm_product_form_reference.js b/commerce_pdm_product_form_reference.js
index 65faa30..2c4c13e 100644
--- a/commerce_pdm_product_form_reference.js
+++ b/commerce_pdm_product_form_reference.js
@@ -7,11 +7,11 @@ Drupal.behaviors.commerce_pdm_form_commerce_product_ui_product_form_alter = {
       var COMMERCE_PDM_TYPE_MESSAGE_ERROR = 'commercePdmTypeMessageError';
 
       // Declare all used elements as understandable variables.
-      $table = $('table#commerce_pdm_product_referenced_by');
-      $newTitleInput = $table.find('input#edit-quick-reference-add-new-reference-actions-commerce-pdm-product-display-title');
-      $newTypeSelect = $table.find('select#edit-quick-reference-add-new-reference-actions-commerce-pdm-product-display-type');
-      $existingNidInput = $table.find('input#edit-quick-reference-add-new-reference-actions-commerce-pdm-product-display-existing');
-      $addButton = $table.find('a#edit-quick-reference-add-new-reference-actions-commerce-pdm-product-display-add');
+      var $table = $('table#commerce_pdm_product_referenced_by');
+      var $newTitleInput = $table.find('input#edit-quick-reference-add-new-reference-actions-commerce-pdm-product-display-title');
+      var $newTypeSelect = $table.find('select#edit-quick-reference-add-new-reference-actions-commerce-pdm-product-display-type');
+      var $existingNidInput = $table.find('input#edit-quick-reference-add-new-reference-actions-commerce-pdm-product-display-existing');
+      var $addButton = $table.find('a#edit-quick-reference-add-new-reference-actions-commerce-pdm-product-display-add');
 
       /**
        *