diff --git a/core/modules/taxonomy/lib/Drupal/taxonomy/Entity/Term.php b/core/modules/taxonomy/lib/Drupal/taxonomy/Entity/Term.php
index 5fb053b..7898d2f 100644
--- a/core/modules/taxonomy/lib/Drupal/taxonomy/Entity/Term.php
+++ b/core/modules/taxonomy/lib/Drupal/taxonomy/Entity/Term.php
@@ -229,7 +229,7 @@ public static function baseFieldDefinitions($entity_type) {
       ->setDescription(t('The weight of this term in relation to other terms.'))
       ->setSetting('default_value', 0);
 
-    $fields['parent'] = FieldDefinition::create('integer')
+    $fields['parent'] = FieldDefinition::create('unsigned_integer')
       ->setLabel(t('Term Parents'))
       ->setDescription(t('The parents of this term.'))
       // Save new terms with no parents by default.