diff --git a/ANNOUNCE b/ANNOUNCE
index a8bca4db1..848b76e4e 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,5 +1,5 @@
 
-Libpng 1.6.0alpha01 - December 4, 2011
+Libpng 1.6.0alpha01 - December 5, 2011
 
 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.
@@ -107,7 +107,7 @@ Version 1.5.7beta05 [(PENDING RELEASE)]
   Added MINGW support to CMakeLists.txt
   Reject invalid compression flag or method when reading the iTXt chunk.
 
-Version 1.6.0alpha01 [December 4, 2011]
+Version 1.6.0alpha01 [December 5, 2011]
   Removed machine-generated configure files from the GIT repository (they will
     continue to appear in the tarball distributions).
   Restored the new 'simplified' API, which was deleted from libpng-1.5.7.
@@ -134,6 +134,7 @@ Version 1.6.0alpha01 [December 4, 2011]
   Revised pngconf.h to use " __declspec(restrict)" only when MSC_VER >= 1400,
     as in libpng-1.5.4.
   Put CRLF line endings in the owatcom project files.
+  Fixed minor memset/sizeof errors in pngvalid.c.
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net:
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diff --git a/CHANGES b/CHANGES
index 3e005a7b3..18ad18a7a 100644
--- a/CHANGES
+++ b/CHANGES
@@ -3752,7 +3752,7 @@ Version 1.5.7beta05 [(PENDING RELEASE)]
   Added MINGW support to CMakeLists.txt
   Reject invalid compression flag or method when reading the iTXt chunk.
 
-Version 1.6.0alpha01 [December 4, 2011]
+Version 1.6.0alpha01 [December 5, 2011]
   Removed machine-generated configure files from the GIT repository (they will
     continue to appear in the tarball distributions).
   Restored the new 'simplified' API, which was deleted from libpng-1.5.7.
@@ -3779,6 +3779,7 @@ Version 1.6.0alpha01 [December 4, 2011]
   Revised pngconf.h to use " __declspec(restrict)" only when MSC_VER >= 1400,
     as in libpng-1.5.4.
   Put CRLF line endings in the owatcom project files.
+  Fixed minor memset/sizeof errors in pngvalid.c.
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
diff --git a/contrib/libtests/pngvalid.c b/contrib/libtests/pngvalid.c
index ac0dcdcda..5ce43d3c3 100644
--- a/contrib/libtests/pngvalid.c
+++ b/contrib/libtests/pngvalid.c
@@ -4091,7 +4091,7 @@ read_palette(store_palette palette, int *npalette, png_structp pp, png_infop pi)
          png_error(pp, "validate: invalid PLTE result");
       /* But there is no palette, so record this: */
       *npalette = 0;
-      memset(palette, 113, sizeof palette);
+      memset(palette, 113, sizeof (store_palette));
    }
 
    trans_alpha = 0;
@@ -5277,7 +5277,7 @@ static void
 transform_display_init(transform_display *dp, png_modifier *pm, png_uint_32 id,
     PNG_CONST image_transform *transform_list)
 {
-   memset(dp, 0, sizeof dp);
+   memset(dp, 0, sizeof *dp);
 
    /* Standard fields */
    standard_display_init(&dp->this, &pm->this, id, 0/*do_interlace*/,