diff --git a/NEWS b/NEWS
index 62ea3371a..14e74b595 100644
--- a/NEWS
+++ b/NEWS
@@ -468,6 +468,12 @@ chapter in the reference manual.
 
 There is no replacement for undefine.
 
+** call-with-output-string doesn't segv on closed port
+
+Previously call-with-output-string would give a segmentation fault if
+the string port was closed by the called function.  An exception is
+raised now.
+
 ** (ice-9 popen) duplicate pipe fd fix
 
 open-pipe, open-input-pipe and open-output-pipe left an extra copy of