diff --git a/app/assets/javascripts/preventDuplicateFormSubmissions.js b/app/assets/javascripts/preventDuplicateFormSubmissions.js
index 0eca28039..61e2e6890 100644
--- a/app/assets/javascripts/preventDuplicateFormSubmissions.js
+++ b/app/assets/javascripts/preventDuplicateFormSubmissions.js
@@ -4,7 +4,7 @@
 
   let disableSubmitButtons = function(event) {
 
-    $submitButton = $(this).find(':submit');
+    var $submitButton = $(this).find(':submit');
 
     if ($submitButton.data('clicked') == 'true') {