diff --git a/core/modules/options/lib/Drupal/options/Plugin/field/field_type/ListItemBase.php b/core/modules/options/lib/Drupal/options/Plugin/field/field_type/ListItemBase.php
index bc46a05..a6ccff0 100644
--- a/core/modules/options/lib/Drupal/options/Plugin/field/field_type/ListItemBase.php
+++ b/core/modules/options/lib/Drupal/options/Plugin/field/field_type/ListItemBase.php
@@ -48,7 +48,7 @@ public function getSettableValues(AccountInterface $account = NULL) {
    * {@inheritdoc}
    */
   public function getSettableOptions(AccountInterface $account = NULL) {
-    $instance = $this->getInstance();
+    $instance = $this->getFieldDefinition();
     $entity = $this->getParent()->getParent();
 
     if (!isset($entity)) {
@@ -56,7 +56,7 @@ public function getSettableOptions(AccountInterface $account = NULL) {
       $entity = _field_create_entity_from_ids($ids);
     }
 
-    $allowed_options = options_allowed_values($this->getInstance(), $entity);
+    $allowed_options = options_allowed_values($this->getFieldDefinition(), $entity);
     return $allowed_options;
   }
 
@@ -75,7 +75,7 @@ public static function schema(FieldInterface $field) {
    * {@inheritdoc}
    */
   public function settingsForm(array $form, array &$form_state, $has_data) {
-    $instance = $this->getInstance();
+    $instance = $this->getFieldDefinition();
     $field = $instance->getField();
     $settings = $field->getFieldSettings();
 
@@ -315,7 +315,7 @@ public function getConstraints() {
     $constraint_manager = \Drupal::typedData()->getValidationConstraintManager();
     $constraints = parent::getConstraints();
 
-    $instance = $this->getInstance();
+    $instance = $this->getFieldDefinition();
     $constraints[] = $constraint_manager->create('ComplexData', array(
       'value' => array(
         'AllowedValues' => array(