diff --git a/lib/translations/pt_BR.js b/lib/translations/pt_BR.js
index 01b32f15..71959bcd 100644
--- a/lib/translations/pt_BR.js
+++ b/lib/translations/pt_BR.js
@@ -5,6 +5,7 @@ jQuery.extend( jQuery.fn.pickadate.defaults, {
     monthsShort: [ 'jan', 'fev', 'mar', 'abr', 'mai', 'jun', 'jul', 'ago', 'set', 'out', 'nov', 'dez' ],
     weekdaysFull: [ 'domingo', 'segunda-feira', 'terça-feira', 'quarta-feira', 'quinta-feira', 'sexta-feira', 'sábado' ],
     weekdaysShort: [ 'dom', 'seg', 'ter', 'qua', 'qui', 'sex', 'sab' ],
+    weekdaysLetter: [ 'D', 'S', 'T', 'Q', 'Q', 'S', 'S' ],
     today: 'hoje',
     clear: 'limpar',
     close: 'fechar',