diff --git a/core/lib/Drupal/Core/Entity/ContentEntityBase.php b/core/lib/Drupal/Core/Entity/ContentEntityBase.php
index b1e2d7a..97d180b 100644
--- a/core/lib/Drupal/Core/Entity/ContentEntityBase.php
+++ b/core/lib/Drupal/Core/Entity/ContentEntityBase.php
@@ -571,7 +571,7 @@ public function language() {
       // @todo Avoid this check by getting the language from the language
       //   manager directly.
       if (!isset($this->languages[$this->defaultLangcode])) {
-        $this->languages += $this->languageManager()->getLanguages(Language::STATE_ALL);
+        $this->languages += $this->languageManager()->getLanguages(LanguageInterface::STATE_ALL);
       }
       $language = $this->languages[$this->defaultLangcode];
     }