diff --git a/programs/hash/hello.c b/programs/hash/hello.c
index f1e93ab..9732fb4 100644
--- a/programs/hash/hello.c
+++ b/programs/hash/hello.c
@@ -1,7 +1,9 @@
 /*
  *  Classic "Hello, world" demonstration program
  *
- *  Copyright (C) 2006-2007  Christophe Devine
+ *  Based on XySSL: Copyright (C) 2006-2008  Christophe Devine
+ *
+ *  Copyright (C) 2009       Paul Bakker
  *
  *  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
diff --git a/programs/hash/md5sum.c b/programs/hash/md5sum.c
index d246900..fae65ce 100644
--- a/programs/hash/md5sum.c
+++ b/programs/hash/md5sum.c
@@ -1,7 +1,9 @@
 /*
  *  md5sum demonstration program
  *
- *  Copyright (C) 2006-2007  Christophe Devine
+ *  Based on XySSL: Copyright (C) 2006-2008  Christophe Devine
+ *
+ *  Copyright (C) 2009       Paul Bakker
  *
  *  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
diff --git a/programs/hash/sha1sum.c b/programs/hash/sha1sum.c
index 53a97d0..b067921 100644
--- a/programs/hash/sha1sum.c
+++ b/programs/hash/sha1sum.c
@@ -1,7 +1,9 @@
 /*
  *  sha1sum demonstration program
  *
- *  Copyright (C) 2006-2007  Christophe Devine
+ *  Based on XySSL: Copyright (C) 2006-2008  Christophe Devine
+ *
+ *  Copyright (C) 2009       Paul Bakker
  *
  *  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
diff --git a/programs/hash/sha2sum.c b/programs/hash/sha2sum.c
index beb21cb..e9f4155 100644
--- a/programs/hash/sha2sum.c
+++ b/programs/hash/sha2sum.c
@@ -1,7 +1,9 @@
 /*
  *  sha2sum demonstration program
  *
- *  Copyright (C) 2006-2007  Christophe Devine
+ *  Based on XySSL: Copyright (C) 2006-2008  Christophe Devine
+ *
+ *  Copyright (C) 2009       Paul Bakker
  *
  *  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