diff --git a/po/nl.po b/po/nl.po
index cd897cefd7..7be79489e4 100644
--- a/po/nl.po
+++ b/po/nl.po
@@ -1370,7 +1370,7 @@ msgstr "za"
 #. l10n: Minimal week day name
 #: js/messages.php:205
 msgid "Su"
-msgstr "Zo"
+msgstr "zo"
 
 #. l10n: Minimal week day name
 #: js/messages.php:207