diff --git a/TitleBlacklist.i18n.php b/TitleBlacklist.i18n.php
index 631ddb19..e335043a 100644
--- a/TitleBlacklist.i18n.php
+++ b/TitleBlacklist.i18n.php
@@ -405,6 +405,8 @@ $messages['zh-hant'] = array(
 	'titleblacklist-invalid' => '以下在標題黑名單上的{{PLURAL:$1|一行|多行}}無效；請在保存前改正{{PLURAL:$1|它|它們}}:',
 );
 
+# Fallbacks:
+$messages['de-formal'] = $messages['de'];
 $messages['kk'] = $messages['kk-cyrl'];
 $messages['kk-cn'] = $messages['kk-arab'];
 $messages['kk-kz'] = $messages['kk-cyrl'];