2 files changed, 5 insertions, 0 deletions
diff --git a/Misc/ACKS b/Misc/ACKS
index f534143..5df7962 100644
--- a/Misc/ACKS
+++ b/Misc/ACKS
@@ -658,6 +658,7 @@ Skip Montanaro
 Paul Moore
 Derek Morr
 James A Morrison
+Alessandro Moura
 Pablo Mouzo
 Mher Movsisyan
 Ruslan Mstoi
diff --git a/Misc/NEWS b/Misc/NEWS
index 93b679b..3e75f44 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -115,6 +115,10 @@ Core and Builtins
 Library
 -------
 
+- Issue #15841: The readable(), writable() and seekable() methods of BytesIO
+  and StringIO objects now raise ValueError when the object has been closed.
+  Patch by Alessandro Moura.
+
 - Issue #15509: webbrowser.UnixBrowser no longer passes empty arguments to
   Popen when %action substitutions produce empty strings.