diff --git a/info.textgrid.middleware.tgauth.tgaccount/include/tgSqliteDB.class.php b/info.textgrid.middleware.tgauth.tgaccount/include/tgSqliteDB.class.php
index 009c430802d7d4b67e4fae66fbebfd9221b82da2..1259fe21e83bb340bb9bba35137b5ee4cc328466 100644
--- a/info.textgrid.middleware.tgauth.tgaccount/include/tgSqliteDB.class.php
+++ b/info.textgrid.middleware.tgauth.tgaccount/include/tgSqliteDB.class.php
@@ -57,6 +57,8 @@ class tgSqliteDB {
       $result = $result->fetchArray(SQLITE3_ASSOC);
 
       $result["pref_uid"] = str_replace(" ", "", $result["pref_uid"]);
+
+      setlocale(LC_CTYPE, 'de_DE');
       $result["pref_uid"] = iconv("UTF-8", "ASCII//TRANSLIT", $result["pref_uid"]);
 
       return $result;