diff --git a/CHANGES.rst b/CHANGES.rst
index 08d11301e..70fc5af4c 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -4,6 +4,9 @@ Changes in synapse v0.31.2 (2018-06-14)
 SECURITY UPDATE: Prevent unauthorised users from setting state events in a room
 when there is no ``m.room.power_levels`` event in force in the room. (PR #3397)
 
+Discussion around the Matrix Spec change proposal for this change can be
+followed at https://github.com/matrix-org/matrix-doc/issues/1304.
+
 Changes in synapse v0.31.1 (2018-06-08)
 =======================================