diff --git a/Misc/NEWS b/Misc/NEWS
index f7e126f..570f647 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -12,6 +12,10 @@
 Core and Builtins
 -----------------
 
+- Issue #4604: Some objects of the I/O library could still be used after 
+  having been closed (for instance, a read() call could return some
+  previously buffered data). Patch by Dmitry Vasiliev.
+
 - Issue #4705: Fix the -u ("unbuffered binary stdout and stderr") command-line
   flag to work properly. Furthermore, when specifying -u, the text stdout
   and stderr streams have line-by-line buffering enabled (the default being