diff --git a/po/bg.po b/po/bg.po
index 8aeb6433ed..59f09fe0c3 100644
--- a/po/bg.po
+++ b/po/bg.po
@@ -1230,7 +1230,7 @@ msgstr "ноември"
 
 #: js/messages.php:157
 msgid "December"
-msgstr ""
+msgstr "декември"
 
 #. l10n: Short month name
 #: js/messages.php:161 libraries/common.lib.php:1569