diff --git a/i18n/i18n.php b/i18n/i18n.php
index 2c593b06f..325b8faff 100644
--- a/i18n/i18n.php
+++ b/i18n/i18n.php
@@ -694,8 +694,8 @@ class i18n extends Object implements TemplateGlobalProvider {
 		'om' => array('Oromo', 'Afaan Oromo'),
 		'fa' => array('Persian', 'فارسى'),
 		'pl' => array('Polish', 'polski'),
-		'pt-PT' => array('Portuguese (Portugal)', 'português (Portugal)'),
-		'pt-BR' => array('Portuguese (Brazil)', 'português (Brazil)'),
+		'pt_PT' => array('Portuguese (Portugal)', 'português (Portugal)'),
+		'pt_BR' => array('Portuguese (Brazil)', 'português (Brazil)'),
 		'pa' => array('Punjabi', 'ਪੰਜਾਬੀ'),
 		'qu' => array('Quechua', 'Quechua'),
 		'rm' => array('Romansh', 'rumantsch'),