From 9551e1389532a065d8828352ca66a6ffecf6a9ce Mon Sep 17 00:00:00 2001
From: Scott Sanderson <ssanderson@quantopian.com>
Date: Wed, 10 Feb 2016 18:51:33 -0500
Subject: [PATCH] DOC: Add whatsnew entry.

---
 docs/source/whatsnew/0.8.4.txt | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/docs/source/whatsnew/0.8.4.txt b/docs/source/whatsnew/0.8.4.txt
index fe0df981..2b86d8f1 100644
--- a/docs/source/whatsnew/0.8.4.txt
+++ b/docs/source/whatsnew/0.8.4.txt
@@ -130,6 +130,9 @@ Bug Fixes
 * Fixed issues around KeyErrors coming from history and BarData on 32-bit
   python, where Assets did not compare properly with int64s (:issue:`959`).
 
+* Fixed a bug where boolean operators were not properly implemented on
+  :class:~zipline.pipeline.Filter` (:issue:`991`).
+
 
 Performance
 ~~~~~~~~~~~