diff --git a/po/ja.po b/po/ja.po
index c97df97c1..e70b5036a 100644
--- a/po/ja.po
+++ b/po/ja.po
@@ -2179,7 +2179,7 @@ msgstr "正の値ではありません"
 #: libraries/config/FormDisplay.class.php:84
 #: libraries/config/validate.lib.php:435
 msgid "Not a non-negative number"
-msgstr ""
+msgstr "負の値ではありません"
 
 #: libraries/config/FormDisplay.class.php:85
 #: libraries/config/validate.lib.php:409