diff --git a/Misc/NEWS b/Misc/NEWS
index 30c3a0f..ca5eef1 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -76,6 +76,11 @@
 Library
 -------
 
+- Issue #5008: When a file is opened in append mode with the new IO library,
+  do an explicit seek to the end of file (so that e.g. tell() returns the
+  file size rather than 0). This is consistent with the behaviour of the
+  traditional 2.x file object.
+
 - Issue #3997: zipfiles generated with more than 65536 files could not be
   opened with other applications.