diff --git a/contrib/examples/README.txt b/contrib/examples/README.txt
index 9320cbad3..0525c9d36 100644
--- a/contrib/examples/README.txt
+++ b/contrib/examples/README.txt
@@ -1,7 +1,11 @@
-This directory contains examples of libpng usage.
 
-NO COPYRIGHT IS CLAIMED TO ANY OF THE FILES IN THIS DIRECTORY.
-They have been placed in the public domain by the authors.
+This directory (contrib/examples) contains examples of libpng usage.
+
+NO COPYRIGHT RIGHTS ARE CLAIMED TO ANY OF THE FILES IN THIS DIRECTORY.
+
+To the extent possible under law, the authors have waived all copyright and
+related or neighboring rights to this work.  This work is published from:
+United States.
 
 The files may be used freely in any way.  The intention is that appropriate
 parts of the files be used in other libpng-using programs without any need for
diff --git a/contrib/examples/iccfrompng.c b/contrib/examples/iccfrompng.c
index a9b47136e..67676219e 100644
--- a/contrib/examples/iccfrompng.c
+++ b/contrib/examples/iccfrompng.c
@@ -1,7 +1,9 @@
 /*- iccfrompng
  *
- * COPYRIGHT: please read the file "README.txt" from the containing directory..
- * This file has been placed in the public domain by the authors.
+ * COPYRIGHT: Written by John Cunningham Bowler, 2011.
+ * To the extent possible under law, the author has waived all copyright and
+ * related or neighboring rights to this work.  This work is published from:
+ * United States.
  *
  * Extract any icc profiles found in the given PNG files.  This is a simple
  * example of a program which extracts information from the header of a PNG file
diff --git a/contrib/examples/pngpixel.c b/contrib/examples/pngpixel.c
index 2310183c0..1c29cf027 100644
--- a/contrib/examples/pngpixel.c
+++ b/contrib/examples/pngpixel.c
@@ -1,7 +1,9 @@
 /*- pngpixel
  *
- * COPYRIGHT: please read the file "README.txt" from the containing directory.
- * This file has been placed in the public domain by the authors.
+ * COPYRIGHT: Written by John Cunningham Bowler, 2011.
+ * To the extent possible under law, the author has waived all copyright and
+ * related or neighboring rights to this work.  This work is published from:
+ * United States.
  *
  * Read a single pixel value from a PNG file.
  *
diff --git a/contrib/examples/pngtopng.c b/contrib/examples/pngtopng.c
index 1d303dbfd..a2610bb3e 100644
--- a/contrib/examples/pngtopng.c
+++ b/contrib/examples/pngtopng.c
@@ -1,7 +1,9 @@
 /*- pngtopng
  *
- * COPYRIGHT: please read the file "README.txt" from the containing directory.
- * This file has been placed in the public domain by the authors.
+ * COPYRIGHT: Written by John Cunningham Bowler, 2011.
+ * To the extent possible under law, the author has waived all copyright and
+ * related or neighboring rights to this work.  This work is published from:
+ * United States.
  *
  * Read a PNG and write it out in a fixed format
  *
diff --git a/example.c b/example.c
index 6343f21af..e8bfdd093 100644
--- a/example.c
+++ b/example.c
@@ -2,11 +2,13 @@
 #if 0 /* in case someone actually tries to compile this */
 
 /* example.c - an example of using libpng
- * Last changed in libpng 1.5.6 [November 3, 2011]
- * This file has been placed in the public domain by the authors.
+ * Last changed in libpng 1.5.7 [(PENDING RELEASE)]
  * Maintained 1998-2011 Glenn Randers-Pehrson
  * Maintained 1996, 1997 Andreas Dilger)
  * Written 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
+ * To the extent possible under law, the authors have waived
+ * all copyright and related or neighboring rights to this file.
+ * This work is published from: United States.
  */
 
 /* This is an example of how to use libpng to read and write PNG files.