Issue #2643: msync() is not called anymore when deallocating an open mmap
object, only munmap().
diff --git a/Misc/NEWS b/Misc/NEWS
index 139ab01..cdd9ef7 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -58,6 +58,9 @@
 Library
 -------
 
+- Issue #2643: msync() is not called anymore when deallocating an open mmap
+  object, only munmap().
+
 - logging: Changed LoggerAdapter implementation internally, to make it
   easier to subclass in a useful way.