documentation update

[ginac.git] / ginac / archive.h

diff --git a/ginac/archive.h b/ginac/archive.h
index fd4430da4b0c1ea6e1a04544ce4cfb819b3fcfc6..d56c0e6ce65e7b58ab3f948b7c86125c51df039a 100644 (file)
--- a/ginac/archive.h
+++ b/ginac/archive.h
@@ -3,7 +3,7 @@
  *  Archiving of GiNaC expressions. */
 
 /*
- *  GiNaC Copyright (C) 1999-2000 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2001 Johannes Gutenberg University Mainz, Germany
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -27,11 +27,7 @@
 
 #include <string>
 #include <vector>
-
-namespace std {
-       class ostream;
-       class istream;
-}
+#include <iostream>
 
 #ifndef NO_NAMESPACE_GINAC
 namespace GiNaC {