diff --git a/core/includes/language.inc b/core/includes/language.inc
index 43e837e..2b918e8 100644
--- a/core/includes/language.inc
+++ b/core/includes/language.inc
@@ -176,7 +176,8 @@ function language_types_info() {
 function language_types_get_configurable() {
   $configurable = &drupal_static(__FUNCTION__);
   if (!isset($configurable)) {
-    $configurable = array_keys(array_filter(config('system.language.types')->get('configurable')));
+    $configurable = config('system.language.types')->get('configurable');
+    $configurable = empty($configurable) ? array() : array_keys(array_filter($configurable));
   }
   return $configurable;
 }