diff --git a/modoboa/locale/fr/LC_MESSAGES/djangojs.po b/modoboa/locale/fr/LC_MESSAGES/djangojs.po
index 249e99dec..bbb19a769 100644
--- a/modoboa/locale/fr/LC_MESSAGES/djangojs.po
+++ b/modoboa/locale/fr/LC_MESSAGES/djangojs.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"
 
 #: admin/static/admin/js/admin.js:27
 msgid "Search"