diff --git a/Parser/node.c b/Parser/node.c
index b59e4f7..1362f8b 100644
--- a/Parser/node.c
+++ b/Parser/node.c
@@ -1,6 +1,6 @@
 /***********************************************************
-Copyright 1991, 1992 by Stichting Mathematisch Centrum, Amsterdam, The
-Netherlands.
+Copyright 1991, 1992, 1993 by Stichting Mathematisch Centrum,
+Amsterdam, The Netherlands.
 
                         All Rights Reserved