diff --git a/po/zh_TW.po b/po/zh_TW.po
index 0f9f650522..253dfcf52f 100644
--- a/po/zh_TW.po
+++ b/po/zh_TW.po
@@ -1374,7 +1374,7 @@ msgstr "十一月"
 #. l10n: Short month name
 #: js/messages.php:193 libraries/common.lib.php:1591
 msgid "Dec"
-msgstr "12月"
+msgstr "十二月"
 
 #: js/messages.php:196
 #| msgid "Sun"