diff --git a/ANNOUNCE b/ANNOUNCE
index c914c53d6..daa828bce 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -163,6 +163,7 @@ Version 1.5.3beta11 [June 11, 2011]
     wrong (high by one) 25% of the time. Dividing by 257 with rounding is
     wrong in 128 out of 65536 cases. Getting the right answer all the time
     without division is easy.
+  Added "_SUPPORTED" to the PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION macro.
 
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diff --git a/CHANGES b/CHANGES
index 96a35a21b..cd97fbb56 100644
--- a/CHANGES
+++ b/CHANGES
@@ -3426,6 +3426,7 @@ Version 1.5.3beta11 [June 11, 2011]
     wrong (high by one) 25% of the time. Dividing by 257 with rounding is
     wrong in 128 out of 65536 cases. Getting the right answer all the time
     without division is easy.
+  Added "_SUPPORTED" to the PNG_WRITE_CUSTOMIZE_ZTXT_COMPRESSION macro.
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit