diff --git a/core/modules/field/field.multilingual.inc b/core/modules/field/field.multilingual.inc
index f054bf1..50a0a56 100644
--- a/core/modules/field/field.multilingual.inc
+++ b/core/modules/field/field.multilingual.inc
@@ -247,8 +247,8 @@ function field_valid_language($langcode, $default = TRUE) {
   if (in_array($langcode, $enabled_languages)) {
     return $langcode;
   }
-  global $language_content;
-  return $default ? language_default()->langcode : $language_content->langcode;
+  $language_content = drupal_container()->get(LANGUAGE_TYPE_CONTENT);
+  return $language_content->langcode;
 }
 
 /**