diff --git a/libImaging/QuantPngQuant.c b/libImaging/QuantPngQuant.c
index aae18b895..a9a547540 100644
--- a/libImaging/QuantPngQuant.c
+++ b/libImaging/QuantPngQuant.c
@@ -1,27 +1,12 @@
-/* Copyright (c) 2010 Oliver Tonnhofer <olt@bogosoft.com>, Omniscale
-//
-// Permission is hereby granted, free of charge, to any person obtaining a copy
-// of this software and associated documentation files (the "Software"), to deal
-// in the Software without restriction, including without limitation the rights
-// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-// copies of the Software, and to permit persons to whom the Software is
-// furnished to do so, subject to the following conditions:
-//
-// The above copyright notice and this permission notice shall be included in
-// all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-// THE SOFTWARE.
-*/
-
 /*
-// This file implements a quantization using libimagequant, a part of pngquant.
-*/
+ * The Python Imaging Library
+ * $Id$
+ *
+ * quantization using libimagequant, a part of pngquant.
+ *
+ * Copyright (c) 2016 Marcin Kurczewski <rr-@sakuya.pl>
+ *
+ */
 
 #include <stdio.h>
 #include <stdlib.h>