diff --git a/sample/preproc/Assistant.java b/sample/preproc/Assistant.java
index 81b93b25..7ef15c4b 100644
--- a/sample/preproc/Assistant.java
+++ b/sample/preproc/Assistant.java
@@ -1,11 +1,12 @@
 /*
  * Javassist, a Java-bytecode translator toolkit.
- * Copyright (C) 1999-2005 Shigeru Chiba. All Rights Reserved.
+ * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved.
  *
  * The contents of this file are subject to the Mozilla Public License Version
  * 1.1 (the "License"); you may not use this file except in compliance with
  * the License.  Alternatively, the contents of this file may be used under
- * the terms of the GNU Lesser General Public License Version 2.1 or later.
+ * the terms of the GNU Lesser General Public License Version 2.1 or later,
+ * or the Apache License Version 2.0.
  *
  * Software distributed under the License is distributed on an "AS IS" basis,
  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
diff --git a/sample/preproc/Compiler.java b/sample/preproc/Compiler.java
index 5481c0fc..085e09e0 100644
--- a/sample/preproc/Compiler.java
+++ b/sample/preproc/Compiler.java
@@ -1,11 +1,12 @@
 /*
  * Javassist, a Java-bytecode translator toolkit.
- * Copyright (C) 1999-2005 Shigeru Chiba. All Rights Reserved.
+ * Copyright (C) 1999- Shigeru Chiba. All Rights Reserved.
  *
  * The contents of this file are subject to the Mozilla Public License Version
  * 1.1 (the "License"); you may not use this file except in compliance with
  * the License.  Alternatively, the contents of this file may be used under
- * the terms of the GNU Lesser General Public License Version 2.1 or later.
+ * the terms of the GNU Lesser General Public License Version 2.1 or later,
+ * or the Apache License Version 2.0.
  *
  * Software distributed under the License is distributed on an "AS IS" basis,
  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License