diff --git a/po/sl.po b/po/sl.po
index 1af64d290..f0c716d23 100644
--- a/po/sl.po
+++ b/po/sl.po
@@ -1245,7 +1245,7 @@ msgstr "po"
 #. l10n: Minimal week day name
 #: js/messages.php:152
 msgid "Tu"
-msgstr "To"
+msgstr "to"
 
 #. l10n: Minimal week day name
 #: js/messages.php:154