diff --git a/po/sl.po b/po/sl.po
index 9b87f1ab3..a882292b8 100644
--- a/po/sl.po
+++ b/po/sl.po
@@ -207,7 +207,7 @@ msgstr "nov"
 
 #: libraries/messages.inc.php:28
 msgid "Dec"
-msgstr "Dec"
+msgstr "dec"
 
 #. l10n: See http://www.php.net/manual/en/function.strftime.php to define the format string
 #: libraries/messages.inc.php:30