diff --git a/include/boost/ratio/mpl/plus.hpp b/include/boost/ratio/mpl/plus.hpp
index a3d137d..99f5d3e 100644
--- a/include/boost/ratio/mpl/plus.hpp
+++ b/include/boost/ratio/mpl/plus.hpp
@@ -1,6 +1,6 @@
 //  plus.hpp
 //
-//  (C) Copyright 2011Vicente J. Botet Escriba
+//  (C) Copyright 2011 Vicente J. Botet Escriba
 //  Use, modification and distribution are subject to the Boost Software License,
 //  Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
 //  http://www.boost.org/LICENSE_1_0.txt).