diff --git a/program/localization/index.inc b/program/localization/index.inc
index 38edb7367..b1ea83608 100644
--- a/program/localization/index.inc
+++ b/program/localization/index.inc
@@ -149,6 +149,7 @@ $rcube_language_aliases = array(
   'ml' => 'ml_IN',
   'ml_ML' => 'ml_IN',
   'pl' => 'pl_PL',
+  'tr' => 'tr_TR',
   'tw' => 'zh_TW',
   'si' => 'si_LK',
   'sl' => 'sl_SI',