diff --git a/ANNOUNCE b/ANNOUNCE
index 80cdb4fbb..37f1cafec 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -656,6 +656,7 @@ version 1.4.0beta96 [November 12, 2009]
   Removed recently removed function names from scripts/*.def
   Revised pngtest.png to put chunks in the same order written by pngtest
     (evidently the same change made in libpng-1.0beta54 was lost).
+  Added PNG_PRIVATE macro definition in pngconf.h for possible future use.
 
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diff --git a/CHANGES b/CHANGES
index 4a5c02377..467fe6d3f 100644
--- a/CHANGES
+++ b/CHANGES
@@ -2342,6 +2342,7 @@ version 1.4.0beta96 [November 12, 2009]
   Removed recently removed function names from scripts/*.def
   Revised pngtest.png to put chunks in the same order written by pngtest
     (evidently the same change made in libpng-1.0beta54 was lost).
+  Added PNG_PRIVATE macro definition in pngconf.h for possible future use.
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
diff --git a/pngconf.h b/pngconf.h
index ad9b48338..a47f559d0 100644
--- a/pngconf.h
+++ b/pngconf.h
@@ -1312,6 +1312,9 @@ typedef char            FAR * FAR * FAR * png_charppp;
 #    ifndef PNG_DEPSTRUCT
 #      define PNG_DEPSTRUCT  __attribute__((__deprecated__))
 #    endif
+#    ifndef PNG_PRIVATE
+#      define PNG_PRIVATE __attribute__((__deprecated__))
+#    endif
 #  endif
 #endif
 
@@ -1330,6 +1333,9 @@ typedef char            FAR * FAR * FAR * png_charppp;
 #ifndef PNG_DEPSTRUCT
 #  define PNG_DEPSTRUCT   /* Access to this struct member is deprecated */
 #endif
+#ifndef PNG_PRIVATE
+#  define PNG_PRIVATE     /* This is a private libpng function */
+#endif
 
 /* Users may want to use these so they are not private.  Any library
  * functions that are passed far data must be model-independent.