diff --git a/core/includes/form.inc b/core/includes/form.inc
index 85bffc6..624ea8e 100644
--- a/core/includes/form.inc
+++ b/core/includes/form.inc
@@ -3023,6 +3023,8 @@ function theme_checkboxes($variables) {
  * This is used as a pre render function for checkboxes and radios.
  */
 function form_pre_render_conditional_form_element($element) {
+  // Elements could be used at early bootstrap so t() probably not accessible.
+  $t = get_t();
   // Set the element's title attribute to show #title as a tooltip, if needed.
   if (isset($element['#title']) && $element['#title_display'] == 'attribute') {
     $element['#attributes']['title'] = $element['#title'];