diff --git a/ANNOUNCE b/ANNOUNCE
index af00e885c..0d302812b 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,4 +1,4 @@
-Libpng 1.6.29beta03 - February 28, 2017
+Libpng 1.6.29beta03 - March 1, 2017
 
 This is not intended to be a public release.  It will be replaced
 within a few weeks by a public version or by another test version.
@@ -39,8 +39,10 @@ Version 1.6.29beta02 [February 22, 2017]
     branches; the comments were correct.
   Added code for PowerPC VSX optimisation (Vadim Barkov).
 
-Version 1.6.29beta03 [February 28, 2017]
+Version 1.6.29beta03 [March 1, 2017]
   Avoid potential overflow of shift operations in png_do_expand() (Aaron Boxer).
+  Change test ZLIB_VERNUM >= 0x1281 to ZLIB_VERNUM >= 0x1290 in pngrutil.c
+    because Solaris 11 distributes zlib-1.2.8.f that is older than 1.2.8.1.
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
diff --git a/CHANGES b/CHANGES
index de068fec9..8b9980cd2 100644
--- a/CHANGES
+++ b/CHANGES
@@ -5808,8 +5808,10 @@ Version 1.6.29beta02 [February 22, 2017]
     branches; the comments were correct.
   Added code for PowerPC VSX optimisation (Vadim Barkov).
 
-Version 1.6.29beta03 [February 28, 2017]
+Version 1.6.29beta03 [March 1, 2017]
   Avoid potential overflow of shift operations in png_do_expand() (Aaron Boxer).
+  Change test ZLIB_VERNUM >= 0x1281 to ZLIB_VERNUM >= 0x1290 in pngrutil.c
+    because Solaris 11 distributes zlib-1.2.8.f that is older than 1.2.8.1.
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
diff --git a/pngrutil.c b/pngrutil.c
index 36820cf2f..7f4587a4a 100644
--- a/pngrutil.c
+++ b/pngrutil.c
@@ -1,8 +1,8 @@
 
 /* pngrutil.c - utilities to read a PNG file
  *
- * Last changed in libpng 1.6.27 [December 29, 2016]
- * Copyright (c) 1998-2002,2004,2006-2016 Glenn Randers-Pehrson
+ * Last changed in libpng 1.6.29 [(PENDING RELEASE)]
+ * Copyright (c) 1998-2002,2004,2006-2017 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.)
  *
@@ -418,7 +418,7 @@ png_inflate_claim(png_structrp png_ptr, png_uint_32 owner)
             png_ptr->flags |= PNG_FLAG_ZSTREAM_INITIALIZED;
       }
 
-#if ZLIB_VERNUM >= 0x1281 && \
+#if ZLIB_VERNUM >= 0x1290 && \
    defined(PNG_SET_OPTION_SUPPORTED) && defined(PNG_IGNORE_ADLER32)
       if (((png_ptr->options >> PNG_IGNORE_ADLER32) & 3) == PNG_OPTION_ON)
          /* Turn off validation of the ADLER32 checksum in IDAT chunks */