diff --git a/WHATSNEW b/WHATSNEW
index dd7dd986c..6560fc843 100644
--- a/WHATSNEW
+++ b/WHATSNEW
@@ -14,6 +14,9 @@ Other changes:
 * Translate task logs a debug message specifying the number of files
   that it processed.  Bugzilla Report 13938.
 
+* Enable to choose the regexp implementation without system property.
+  Bugzilla Report 15390.
+
 Changes from Ant 1.5.4 to Ant 1.6
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