diff --git a/installer/data/mysql/de-DE/mandatory/system_preferences.sql b/installer/data/mysql/de-DE/mandatory/system_preferences.sql
index b6f54689dd..76911399e7 100644
--- a/installer/data/mysql/de-DE/mandatory/system_preferences.sql
+++ b/installer/data/mysql/de-DE/mandatory/system_preferences.sql
@@ -34,3 +34,6 @@ UPDATE systempreferences SET value = 'Monday' WHERE variable = 'CalendarFirstDay
 UPDATE systempreferences SET value = '0.07|0.19|0.00' WHERE variable = 'gist';
 UPDATE systempreferences SET value = 'Dieser Text wird über den Systemparameter <a href="/cgi-bin/koha/admin/preferences.pl?op=search&searchfield=RoutingListNote#jumped">RoutlingListNote</a> konfiguriert.' where variable = 'RoutingListNote';
 UPDATE systempreferences SET value = 'barcode stocknumber' WHERE variable = 'uniqueitemfields';
+UPDATE systempreferences SET value = 'de-DE,en' WHERE variable = 'language';
+UPDATE systempreferences SET value = 'de-DE,en' WHERE variable = 'opaclanguages';
+UPDATE systempreferences SET value = '1' WHERE variable = 'opaclanguagesdisplay';