diff --git a/core/modules/migrate_drupal/src/Plugin/migrate/source/ContentEntity.php b/core/modules/migrate_drupal/src/Plugin/migrate/source/ContentEntity.php
index 499762a..ba84b2c 100644
--- a/core/modules/migrate_drupal/src/Plugin/migrate/source/ContentEntity.php
+++ b/core/modules/migrate_drupal/src/Plugin/migrate/source/ContentEntity.php
@@ -228,7 +228,7 @@ protected function doCount() {
   public function fields() {
     // Retrieving fields from a non-fieldable content entity will throw a
     // LogicException. Return an empty list of fields instead.
-    if (!$this->entityType->entityClassImplements(FieldableEntityInterface::class)) {
+    if (!$this->entityType->entityClassImplements('Drupal\Core\Entity\FieldableEntityInterface')) {
       return [];
     }
     $field_definitions = $this->entityFieldManager->getBaseFieldDefinitions($this->entityType->id());