diff --git a/ANNOUNCE b/ANNOUNCE
index 05d40a2f4..9d6eecff9 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,5 +1,5 @@
 
-Libpng 1.5.10beta01 - February 23, 2012
+Libpng 1.5.10beta01 - February 24, 2012
 
 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.
@@ -26,7 +26,7 @@ Other information:
 
 Changes since the last public release (1.5.9):
 
-Version 1.5.10beta01 [February 23, 2012]
+Version 1.5.10beta01 [February 24, 2012]
   Removed two useless #ifdef directives from pngread.c and one from pngrutil.c
   Always put the CMAKE_LIBRARY in "lib" (removed special WIN32 case).
   Removed empty vstudio/pngstest directory (Clifford Yapp).
@@ -37,6 +37,8 @@ Version 1.5.10beta01 [February 23, 2012]
   Fixed bug with png_handle_hIST with odd chunk length (Frank Busse).
   Added PNG_SAFE_LIMITS feature to pnglibconf.dfa and code in pngconf.h
     to reset the user limits to safe ones if PNG_SAFE_LIMITS is defined.
+    To enable, use PNG_COPTS=-DPNG_SAFE_LIMITS on the configure command
+    or put #define PNG_SAFE_LIMITS_SUPPORTED in pnglibconf.h.
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net:
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diff --git a/CHANGES b/CHANGES
index 0b764c89e..b76961c1d 100644
--- a/CHANGES
+++ b/CHANGES
@@ -3811,7 +3811,7 @@ Version 1.5.9rc01 [February 17, 2012]
 Version 1.5.9 [February 18, 2012]
   No changes.
 
-Version 1.5.10beta01 [February 23, 2012]
+Version 1.5.10beta01 [February 24, 2012]
   Removed two useless #ifdef directives from pngread.c and one from pngrutil.c
   Always put the CMAKE_LIBRARY in "lib" (removed special WIN32 case).
   Removed empty vstudio/pngstest directory (Clifford Yapp).
@@ -3822,6 +3822,8 @@ Version 1.5.10beta01 [February 23, 2012]
   Fixed bug with png_handle_hIST with odd chunk length (Frank Busse).
   Added PNG_SAFE_LIMITS feature to pnglibconf.dfa and code in pngconf.h
     to reset the user limits to safe ones if PNG_SAFE_LIMITS is defined.
+    To enable, use PNG_COPTS=-DPNG_SAFE_LIMITS on the configure command
+    or put #define PNG_SAFE_LIMITS_SUPPORTED in pnglibconf.h.
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit
diff --git a/scripts/pnglibconf.dfa b/scripts/pnglibconf.dfa
index 3e146684a..862ff2042 100644
--- a/scripts/pnglibconf.dfa
+++ b/scripts/pnglibconf.dfa
@@ -261,7 +261,7 @@ option USER_LIMITS
 option SET_USER_LIMITS requires USER_LIMITS
 
 # Added at libpng-1.5.10
-option SAFE_LIMITS requires USER_LIMITS
+option SAFE_LIMITS enables USER_LIMITS
 
 # Feature added at libpng-1.4.0, this flag added at 1.4.1
 option SET_USER_LIMITS enables SET_CHUNK_CACHE_LIMIT