diff --git a/CHANGES.txt b/CHANGES.txt
index dd9eeb12..138aa99e 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -28,6 +28,12 @@ Unreleased
   your application's ``BeforeRender`` subscribers.
   See https://github.com/Pylons/pyramid_debugtoolbar/pull/284
 
+- Emit a warning and disable the toolbar if the app is being served by
+  a forking / multiprocess wsgi server that sets
+  ``environ['wsgi.multiprocess']`` to ``True``. This should help avoid
+  confusing issues in certain deployments like gunicorn and uwsgi multiprocess
+  modes. See https://github.com/Pylons/pyramid_debugtoolbar/pull/286
+
 3.0.5 (2016-11-1)
 -----------------