diff --git a/po/eo.po b/po/eo.po
index 43035ea..3770117 100644
--- a/po/eo.po
+++ b/po/eo.po
@@ -12,6 +12,7 @@ msgstr ""
 "Language-Team: Esperanto <translation-team-eo@lists.sourceforge.net>\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=utf-8\n"
+"Plural-Forms: nplurals=2; plural=(n != 1);\n"
 "Content-Transfer-Encoding: 8bit\n"
 "X-Poedit-Language: Esperanto\n"
 "X-Poedit-Country: FRANCE\n"