diff --git a/Misc/NEWS b/Misc/NEWS
index 0527d830c91..b5692081e92 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -12,6 +12,8 @@ What's New in Python 2.6 alpha 1?
 Core and builtins
 -----------------
 
+- Bug #1591996: Correctly forward exception in instance_contains().
+
 - Bug #1588287: fix invalid assertion for `1,2` in debug builds.
 
 - Bug #1576657: when setting a KeyError for a tuple key, make sure that