diff --git a/po/zh_CN.po b/po/zh_CN.po
index 5c7782ce2..82e4958f1 100644
--- a/po/zh_CN.po
+++ b/po/zh_CN.po
@@ -1106,7 +1106,7 @@ msgstr "十一月"
 
 #: js/messages.php:92
 msgid "December"
-msgstr ""
+msgstr "十二月"
 
 #. l10n: Short month name
 #: js/messages.php:96 libraries/messages.inc.php:28