diff --git a/install/lang/de_comm/langconfig.php b/install/lang/de_comm/langconfig.php
index 361cedd138a..f7b9113dfb9 100644
--- a/install/lang/de_comm/langconfig.php
+++ b/install/lang/de_comm/langconfig.php
@@ -30,6 +30,6 @@
 
 defined('MOODLE_INTERNAL') || die();
 
-$string['parentlanguage'] = 'de';
+$string['parentlanguage'] = 'de_du';
 $string['thisdirection'] = 'ltr';
 $string['thislanguage'] = 'Deutsch community';