diff --git a/png.h b/png.h
index e9a0d54..fa35e8f 100644
--- a/png.h
+++ b/png.h
@@ -1,6 +1,6 @@
 /* png.h - header file for PNG reference library
  *
- * libpng version 1.2.6rc4 - August 10, 2004
+ * libpng version 1.2.6rc5 - August 10, 2004
  * Copyright (c) 1998-2004 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
@@ -8,7 +8,7 @@
  * Authors and maintainers:
  *  libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat
  *  libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger
- *  libpng versions 0.97, January 1998, through 1.2.6rc4 - August 10, 2004: Glenn
+ *  libpng versions 0.97, January 1998, through 1.2.6rc5 - August 10, 2004: Glenn
  *  See also "Contributing Authors", below.
  *
  * Note about libpng version numbers:
@@ -248,7 +248,7 @@
  *    an official declaration.
  *
  *    This is your unofficial assurance that libpng from version 0.71 and
- *    upward through 1.2.6rc4 are Y2K compliant.  It is my belief that earlier
+ *    upward through 1.2.6rc5 are Y2K compliant.  It is my belief that earlier
  *    versions were also Y2K compliant.
  *
  *    Libpng only has three year fields.  One is a 2-byte unsigned integer
@@ -304,9 +304,9 @@
  */
 
 /* Version information for png.h - this should match the version in png.c */
-#define PNG_LIBPNG_VER_STRING "1.2.6rc4"
+#define PNG_LIBPNG_VER_STRING "1.2.6rc5"
 #define PNG_HEADER_VERSION_STRING \
-   " libpng version 1.2.6rc4 - August 10, 2004 (header)\n"
+   " libpng version 1.2.6rc5 - August 10, 2004 (header)\n"
 
 #define PNG_LIBPNG_VER_SONUM   0
 #define PNG_LIBPNG_VER_DLLNUM  %DLLNUM%
@@ -318,7 +318,7 @@
 /* This should match the numeric part of the final component of
  * PNG_LIBPNG_VER_STRING, omitting any leading zero: */
 
-#define PNG_LIBPNG_VER_BUILD  4
+#define PNG_LIBPNG_VER_BUILD  5
 
 #define PNG_LIBPNG_BUILD_ALPHA    1
 #define PNG_LIBPNG_BUILD_BETA     2
@@ -1310,7 +1310,7 @@
 /* This triggers a compiler error in png.c, if png.c and png.h
  * do not agree upon the version number.
  */
-typedef png_structp version_1_2_6rc4;
+typedef png_structp version_1_2_6rc5;
 
 typedef png_struct FAR * FAR * png_structpp;
 
@@ -2388,6 +2388,12 @@
    png_ptr, png_uint_32 mng_features_permitted));
 #endif
 
+/* For use in png_set_keep_unknown, added to version 1.2.6 */
+#define PNG_HANDLE_CHUNK_AS_DEFAULT   0
+#define PNG_HANDLE_CHUNK_NEVER        1
+#define PNG_HANDLE_CHUNK_IF_SAFE      2
+#define PNG_HANDLE_CHUNK_ALWAYS       3
+
 /* Added to version 1.2.0 */
 #if defined(PNG_ASSEMBLER_CODE_SUPPORTED)
 #define PNG_ASM_FLAG_MMX_SUPPORT_COMPILED  0x01  /* not user-settable */
@@ -2416,12 +2422,6 @@
 #define PNG_SELECT_READ   1
 #define PNG_SELECT_WRITE  2
 
-/* For use in png_set_keep_unknown */
-#define PNG_HANDLE_CHUNK_AS_DEFAULT   0
-#define PNG_HANDLE_CHUNK_NEVER        1
-#define PNG_HANDLE_CHUNK_IF_SAFE      2
-#define PNG_HANDLE_CHUNK_ALWAYS       3
-
 #if !defined(PNG_1_0_X)
 /* pngget.c */
 extern PNG_EXPORT(png_uint_32,png_get_mmx_flagmask)