diff --git a/ANNOUNCE b/ANNOUNCE
index 900ccf0ed..c21334e7c 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,5 +1,5 @@
 
-Libpng 1.7.0beta27 - January 1, 2014
+Libpng 1.7.0beta27 - January 10, 2014
 
 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.
@@ -486,7 +486,9 @@ Version 1.7.0beta26 [January 1, 2014]
     libpng17/png.h and libpng17.a). Three new configure options and some
     rearrangement of Makefile.am allow creation of these links to be disabled.
 
-Version 1.7.0beta27 [January 1, 2014]
+Version 1.7.0beta27 [January 10, 2014]
+  Revised png_check_IHDR() to use PNG_SIZE_MAX instead of PNG_UINT_32_MAX
+    in the test for potential overflow in PNG_ROWBYTES.
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
diff --git a/CHANGES b/CHANGES
index 70c2e3b3a..62b9547fb 100644
--- a/CHANGES
+++ b/CHANGES
@@ -4775,7 +4775,9 @@ Version 1.7.0beta26 [January 1, 2014]
     libpng17/png.h and libpng17.a). Three new configure options and some
     rearrangement of Makefile.am allow creation of these links to be disabled.
 
-Version 1.7.0beta27 [January 1, 2014]
+Version 1.7.0beta27 [January 10, 2014]
+  Revised png_check_IHDR() to use PNG_SIZE_MAX instead of PNG_UINT_32_MAX
+    in the test for potential overflow in PNG_ROWBYTES.
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
diff --git a/png.c b/png.c
index c11d13a4d..ea11d1b36 100644
--- a/png.c
+++ b/png.c
@@ -696,13 +696,13 @@ png_get_copyright(png_const_structrp png_ptr)
 #else
 #  ifdef __STDC__
    return PNG_STRING_NEWLINE \
-     "libpng version 1.7.0beta27 - January 8, 2014" PNG_STRING_NEWLINE \
+     "libpng version 1.7.0beta27 - January 10, 2014" PNG_STRING_NEWLINE \
      "Copyright (c) 1998-2014 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \
      "Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \
      "Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \
      PNG_STRING_NEWLINE;
 #  else
-      return "libpng version 1.7.0beta27 - January 8, 2014\
+      return "libpng version 1.7.0beta27 - January 10, 2014\
       Copyright (c) 1998-2014 Glenn Randers-Pehrson\
       Copyright (c) 1996-1997 Andreas Dilger\
       Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.";
@@ -2381,12 +2381,14 @@ png_check_IHDR(png_const_structrp png_ptr,
       error = 1;
    }
 
-   if (error == 0 && width > (PNG_UINT_32_MAX
+   /* Check for potential overflow in PNG_ROWBYTES calculation */
+   if (error == 0 && width > (PNG_SIZE_MAX
                  >> 3)      /* 8-byte RGBA pixels */
                  - 48       /* bigrowbuf hack */
                  - 1        /* filter byte */
                  - 7*8      /* rounding of width to multiple of 8 pixels */
-                 - 8)       /* extra max_pixel_depth pad */
+                 - 8        /* extra max_pixel_depth pad */
+                 - error)   /* to prevent always-false compiler warning */
       png_warning(png_ptr,
           "Width may be too large for libpng to process pixels");