diff --git a/core/lib/Drupal/Core/TypedData/Type/Map.php b/core/lib/Drupal/Core/TypedData/Type/Map.php
index 345c773..1c11a2e 100644
--- a/core/lib/Drupal/Core/TypedData/Type/Map.php
+++ b/core/lib/Drupal/Core/TypedData/Type/Map.php
@@ -194,7 +194,8 @@ public function getPropertyDefinition($name) {
    */
   public function isEmpty() {
     foreach ($this->properties as $property) {
-      if ($property->getValue() !== NULL) {
+      $definition = $property->getDefinition();
+      if (empty($definition['computed']) && $property->getValue() !== NULL) {
         return FALSE;
       }
     }
diff --git a/core/modules/comment/lib/Drupal/comment/FieldNewItem.php b/core/modules/comment/lib/Drupal/comment/FieldNewItem.php
index 7ef4092..73fabe5 100644
--- a/core/modules/comment/lib/Drupal/comment/FieldNewItem.php
+++ b/core/modules/comment/lib/Drupal/comment/FieldNewItem.php
@@ -33,6 +33,7 @@ public function getPropertyDefinitions() {
         'type' => 'integer',
         'label' => t('Integer value'),
         'class' => '\Drupal\comment\FieldNewValue',
+        'computed' => TRUE,
       );
     }
     return static::$propertyDefinitions;
diff --git a/core/modules/comment/lib/Drupal/comment/FieldNewValue.php b/core/modules/comment/lib/Drupal/comment/FieldNewValue.php
index 9fc5cae..8f9c392 100644
--- a/core/modules/comment/lib/Drupal/comment/FieldNewValue.php
+++ b/core/modules/comment/lib/Drupal/comment/FieldNewValue.php
@@ -21,7 +21,7 @@ class FieldNewValue extends TypedData {
   /**
    * Implements \Drupal\Core\TypedData\TypedDataInterface::getValue().
    */
-  public function getValue($langcode = NULL) {
+  public function getValue() {
     if (!isset($this->value)) {
       if (!isset($this->parent)) {
         throw new InvalidArgumentException('Computed properties require context for computation.');