diff --git a/grammar/kmyacc.php.parser b/grammar/kmyacc.php.parser
index 2551dc5..1f42c75 100644
--- a/grammar/kmyacc.php.parser
+++ b/grammar/kmyacc.php.parser
@@ -6,9 +6,14 @@ $meta #
 #semval(%n,%t) $this->yyastk[$this->yysp-(%l-%n)]
 #include;
 
-/* Prototype file of an object oriented PHP parser.
- * Written by Moriyoshi Koizumi, based on the work by Masato Bito.
- * This file is PUBLIC DOMAIN.
+/* This is an automatically GENERATED file, which should not be manually edited.
+ * Instead edit one of the following:
+ *  * the grammar file grammar/zend_language_parser.phpy
+ *  * the parser sceleton grammar/kymacc.php.parser
+ *  * the preprocessing script grammar/rebuildParser.php
+ *
+ * The sceleton for this parser was written by Moriyoshi Koizumi and is based on
+ * the work by Masato Bito and is in the PUBLIC DOMAIN.
  */
 #if -t
 class #(-p)_Debug extends #(-p)
diff --git a/lib/PHPParser/Parser.php b/lib/PHPParser/Parser.php
index 79b6c0e..e83694c 100644
--- a/lib/PHPParser/Parser.php
+++ b/lib/PHPParser/Parser.php
@@ -1,8 +1,13 @@
 <?php
 
-/* Prototype file of an object oriented PHP parser.
- * Written by Moriyoshi Koizumi, based on the work by Masato Bito.
- * This file is PUBLIC DOMAIN.
+/* This is an automatically GENERATED file, which should not be manually edited.
+ * Instead edit one of the following:
+ *  * the grammar file grammar/zend_language_parser.phpy
+ *  * the parser sceleton grammar/kymacc.php.parser
+ *  * the preprocessing script grammar/rebuildParser.php
+ *
+ * The sceleton for this parser was written by Moriyoshi Koizumi and is based on
+ * the work by Masato Bito and is in the PUBLIC DOMAIN.
  */
 class PHPParser_Parser
 {