diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/UuidItem.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/UuidItem.php
index 1bdd10e..a76bb1b 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/UuidItem.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/UuidItem.php
@@ -49,6 +49,7 @@ public function applyDefaultValue($notify = TRUE) {
    */
   public static function schema(FieldStorageDefinitionInterface $field_definition) {
     $schema = parent::schema($field_definition);
+    $schema['columns']['value']['pgsql_type'] = 'uuid';
     $schema['unique keys']['value'] = array('value');
     return $schema;
   }