diff --git a/language/predefined/interfaces.xml b/language/predefined/interfaces.xml
index 5e7e3a6162..9e19c19786 100644
--- a/language/predefined/interfaces.xml
+++ b/language/predefined/interfaces.xml
@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<!-- $Revision$ -->
-<!-- EN-Revision: 26e26a95fdc3aac9b464068953ea3105dee00f14 Maintainer: takagi Status: ready -->
+<!-- EN-Revision: 267a3d4e60d8a6da941e72d195386b5841052cca Maintainer: takagi Status: ready -->
 <!-- Credits: mumumu -->
 
 <part xml:id="reserved.interfaces" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
@@ -18,6 +17,7 @@
  &language.predefined.iteratoraggregate;
  &language.predefined.internaliterator;
  &language.predefined.throwable;
+ &language.predefined.countable;
  &language.predefined.arrayaccess;
  &language.predefined.serializable;
  &language.predefined.closure;