diff --git a/include/boost/mpl/accumulate.hpp b/include/boost/mpl/accumulate.hpp
index 2017254..dc2c75e 100644
--- a/include/boost/mpl/accumulate.hpp
+++ b/include/boost/mpl/accumulate.hpp
@@ -11,7 +11,7 @@
 //
 // See http://www.boost.org/libs/mpl for documentation.
 
-// $URL$
+// $Id$
 // $Date$
 // $Revision$