diff --git a/ANNOUNCE b/ANNOUNCE
index 3f6845b12..d5807e17d 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -158,7 +158,7 @@ version 1.5.0beta17 [April 17, 2010]
     dependent (and those that are system dependent) are evaluated
     each time - pngconf.h holds these.  Options that can be changed
     per-file in the application are in png.h.  Frozen options are
-    in the new installed header file pnglibconf.h
+    in the new installed header file pnglibconf.h (John Bowler)
   Removed the xcode project because it has not been updated to work
     with libpng-1.5.0.
 
@@ -169,6 +169,7 @@ version 1.5.0beta18 [April 17, 2010]
     errors are disabled via PNG_NO_WARN or PNG_NO_ERROR_TEXT, to avoid
     storing unneeded error/warning text.
   Updated contrib/pngminim project to work with the new pnglibconf.h
+  Added some PNG_NO_* defines to contrib/pngminim/*/pngusr.h to save space.
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net:
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diff --git a/CHANGES b/CHANGES
index 8007bf3c8..09e11a0be 100644
--- a/CHANGES
+++ b/CHANGES
@@ -2639,7 +2639,7 @@ version 1.5.0beta17 [April 17, 2010]
     dependent (and those that are system dependent) are evaluated
     each time - pngconf.h holds these.  Options that can be changed
     per-file in the application are in png.h.  Frozen options are
-    in the new installed header file pnglibconf.h
+    in the new installed header file pnglibconf.h (John Bowler)
   Removed the xcode project because it has not been updated to work
     with libpng-1.5.0.
   Removed the ability to include optional pngusr.h
@@ -2651,6 +2651,7 @@ version 1.5.0beta18 [April 17, 2010]
     errors are disabled via PNG_NO_WARN or PNG_NO_ERROR_TEXT, to avoid
     storing unneeded error/warning text.
   Updated contrib/pngminim project to work with the new pnglibconf.h
+  Added some PNG_NO_* defines to contrib/pngminim/*/pngusr.h to save space.
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
diff --git a/contrib/pngminim/decoder/pngusr.h b/contrib/pngminim/decoder/pngusr.h
index 73e454067..7901876b0 100644
--- a/contrib/pngminim/decoder/pngusr.h
+++ b/contrib/pngminim/decoder/pngusr.h
@@ -70,5 +70,6 @@
 #define PNG_NO_PROGRESSIVE_READ
 #define PNG_NO_USER_LIMITS
 #define PNG_NO_SET_USER_LIMITS
+#define PNG_NO_CONVERT_TIME_RFC1123
 
 #endif /* MINRDPNGCONF_H */
diff --git a/contrib/pngminim/encoder/pngusr.h b/contrib/pngminim/encoder/pngusr.h
index 089c41a41..09897a4cf 100644
--- a/contrib/pngminim/encoder/pngusr.h
+++ b/contrib/pngminim/encoder/pngusr.h
@@ -68,5 +68,6 @@
 #define PNG_NO_EASY_ACCESS
 #define PNG_NO_USER_LIMITS
 #define PNG_NO_SET_USER_LIMITS
+#define PNG_NO_CONVERT_TIME_RFC1123
 
 #endif /* MINWRPNGCONF_H */
diff --git a/contrib/pngminim/preader/pngusr.h b/contrib/pngminim/preader/pngusr.h
index a675a8fb3..cc87e2bc7 100644
--- a/contrib/pngminim/preader/pngusr.h
+++ b/contrib/pngminim/preader/pngusr.h
@@ -60,5 +60,6 @@
 #define PNG_NO_EASY_ACCESS
 #define PNG_NO_USER_LIMITS
 #define PNG_NO_SET_USER_LIMITS
+#define PNG_NO_CONVERT_TIME_RFC1123
 
 #endif /* MINPRDPNGCONF_H */