diff --git a/install/lang/de_du/langconfig.php b/install/lang/de_du/langconfig.php
index d598e3e274e..6c02b128fb3 100644
--- a/install/lang/de_du/langconfig.php
+++ b/install/lang/de_du/langconfig.php
@@ -31,4 +31,4 @@ defined('MOODLE_INTERNAL') || die();
 
 $string['parentlanguage'] = 'de';
 $string['thisdirection'] = 'ltr';
-$string['thislanguage'] = 'Deutsch (Du)';
+$string['thislanguage'] = 'Deutsch (du)';