diff --git a/ANNOUNCE b/ANNOUNCE
index d0a6b95eb..0373428d4 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,5 +1,5 @@
 
-Libpng 1.7.0beta28 - January 12, 2014
+Libpng 1.7.0beta28 - January 14, 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.
@@ -489,8 +489,9 @@ Version 1.7.0beta26 [January 1, 2014]
 Version 1.7.0beta27 [January 10, 2014]
   Removed potentially misleading warning from png_check_IHDR().
 
-Version 1.7.0beta28 [January 12, 2014]
-  Updated scripts/makefile.* to use CPPFLAGS (Cosmin)
+Version 1.7.0beta28 [January 14, 2014]
+  Updated scripts/makefile.* to use CPPFLAGS (Cosmin).
+  Added clang attribute support (Cosmin).
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
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diff --git a/CHANGES b/CHANGES
index 09d9afea8..fc8f5eef5 100644
--- a/CHANGES
+++ b/CHANGES
@@ -4778,8 +4778,9 @@ Version 1.7.0beta26 [January 1, 2014]
 Version 1.7.0beta27 [January 10, 2014]
   Removed potentially misleading warning from png_check_IHDR().
 
-Version 1.7.0beta28 [January 12, 2014]
-  Updated scripts/makefile.* to use CPPFLAGS (Cosmin)
+Version 1.7.0beta28 [January 14, 2014]
+  Updated scripts/makefile.* to use CPPFLAGS (Cosmin).
+  Added clang attribute support (Cosmin).
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
diff --git a/pngconf.h b/pngconf.h
index d4c2f0566..a41aadddc 100644
--- a/pngconf.h
+++ b/pngconf.h
@@ -1,7 +1,7 @@
 
 /* pngconf.h - machine configurable file for libpng
  *
- * libpng version 1.7.0beta28 - January 10, 2014
+ * libpng version 1.7.0beta28 - January 14, 2014
  *
  * Copyright (c) 1998-2013 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -439,6 +439,15 @@
 #ifndef PNG_RESTRICT
 #  define PNG_RESTRICT    /* The C99 "restrict" feature */
 #endif
+
+#ifndef PNG_FP_EXPORT     /* A floating point API. */
+#  ifdef PNG_FLOATING_POINT_SUPPORTED
+#     define PNG_FP_EXPORT(ordinal, type, name, args)\
+         PNG_EXPORT(ordinal, type, name, args);
+#  else                   /* No floating point APIs */
+#     define PNG_FP_EXPORT(ordinal, type, name, args)
+#  endif
+#endif
 #ifndef PNG_FP_EXPORT     /* A floating point API. */
 #  ifdef PNG_FLOATING_POINT_SUPPORTED
 #     define PNG_FP_EXPORT(ordinal, type, name, args)\