diff --git a/core/modules/datetime/datetime.module b/core/modules/datetime/datetime.module
index 3f8ce42..10a5f2c 100644
--- a/core/modules/datetime/datetime.module
+++ b/core/modules/datetime/datetime.module
@@ -341,7 +341,7 @@ function template_preprocess_datetime_form(&$variables) {
 }
 
 /**
- * Prepares variables date selection form templates.
+ * Prepares variables for date selection form templates.
  *
  * Default template: datelist-form.html.twig.
  *
@@ -386,13 +386,7 @@ function template_preprocess_datetime_wrapper(&$variables) {
   $element = $variables['element'];
 
   // If the element is required, a required marker is appended to the label.
-  $required = array();
-  if (!empty($element['#required'])) {
-    $required = array(
-      '#theme' => 'form_required_marker',
-      '#element' => $element,
-    );
-  }
+  $required = !empty($element['#required']) ? theme('form_required_marker', array('element' => $element)) : '';
   $variables['required'] = $required;
 
   if (!empty($element['#title'])) {
diff --git a/core/modules/datetime/templates/datetime-wrapper.html.twig b/core/modules/datetime/templates/datetime-wrapper.html.twig
index a105a50..14cbdb4 100644
--- a/core/modules/datetime/templates/datetime-wrapper.html.twig
+++ b/core/modules/datetime/templates/datetime-wrapper.html.twig
@@ -4,12 +4,10 @@
  * Default theme implementation for datetime form wrapper.
  *
  * Available variables:
- * - content: The form element to be output, usually a
- *   datelist, or datetime.
+ * - content: The form element to be output, usually a datelist, or datetime.
  * - title: The title of the form element.
  * - attributes: Remaining HTML attributes for the form wrapper.
- * - required: A renderable required marker if the form element is required,
- *   otherwise an empty array.
+ * - required: A required marker indicating that the form element is required.
  *
  * @see template_preprocess()
  * @see template_preprocess_datetime_wrapper()
@@ -19,7 +17,7 @@
 #}
 {% if title %}
   <h4 class="label">
-    {{ '!title'|t({ '!title': title }) }}{{ required }}
+    {{ '!title!required'|t({ '!title': title, '!required': required }) }}
   </h4>
 {% endif %}
 <div{{ attributes}}>