diff --git a/WHATSNEW b/WHATSNEW
index 94eaf1798..6f557efa2 100644
--- a/WHATSNEW
+++ b/WHATSNEW
@@ -19,6 +19,9 @@ Changes that could break older environments:
 Fixed bugs:
 -----------
 
+ * mmap-based file copy problems under JDK 1.4 on Linux.
+   Bugzilla Report 49430.
+
  * The Sun JVM tries to mmap the entire file during a copy. 
    For large files this is not feasible. 
    We now explicitly request to copy at most 16 MiB per request.