diff --git a/po/ja.po b/po/ja.po
index 82b4c95a..24be9d90 100644
--- a/po/ja.po
+++ b/po/ja.po
@@ -15,6 +15,7 @@ msgstr ""
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
+"Plural-Forms: nplurals=2; plural=(n != 1);\n"
 
 #: ../src/eekboard.c:143
 msgid "_File"