diff --git a/app/assets/javascripts/frontend/custom_questions/support_letters.js.coffee b/app/assets/javascripts/frontend/custom_questions/support_letters.js.coffee
index 997ec6639..8b71ff786 100644
--- a/app/assets/javascripts/frontend/custom_questions/support_letters.js.coffee
+++ b/app/assets/javascripts/frontend/custom_questions/support_letters.js.coffee
@@ -34,7 +34,7 @@ window.SupportLetters =
       textContainer.removeClass('govuk-!-display-none')
       scanningText = '<p class="govuk-hint">(File uploaded and is being scanned for viruses. Preview available once the scan is complete.)</p>'
       textContainer.prepend('<div class="support-letter-attachment-filename"><p class="govuk-body">' + filename + '</p>' + scanningText + '</div>')
-      hiddenInput = $("<input class='js-support-letter-attachment-id' type='hidden' name='#{$el.attr("name")}' value='#{data.result['id']}' />")
+      hiddenInput = $('<input class="js-support-letter-attachment-id" type="hidden" name="#{$el.attr("name")}" value="#{data.result['id']}" />')
       parent.append(hiddenInput)
       parent.find('.js-support-letter-attachment').addClass('govuk-!-display-none')
       SupportLetters.autosave()