diff --git a/WHATSNEW b/WHATSNEW
index a5ab76738..1605686af 100644
--- a/WHATSNEW
+++ b/WHATSNEW
@@ -67,6 +67,8 @@ Fixed bugs:
 * <apply> didn't compare timestamps of source and targetfiles when
   using a nested <filelist>.  Bugzilla Report 26985.
 
+* tagdiff.xml was broken in ant 1.6.1. Bugzilla Report 27057.
+
 Other changes:
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