diff --git a/lang/en/langconfig.php b/lang/en/langconfig.php
index 6af73c59b0091..691fe72d57b0f 100644
--- a/lang/en/langconfig.php
+++ b/lang/en/langconfig.php
@@ -27,6 +27,7 @@
 $string['backupnameformat'] = '%Y%m%d-%H%M';
 $string['decsep'] = '.';
 $string['firstdayofweek'] = '0';
+$string['iso6392'] = 'eng';
 $string['listsep'] = ',';
 $string['locale'] = 'en_AU.UTF-8';
 $string['localewin'] = 'English_Australia.1252';