diff --git a/CHANGES.md b/CHANGES.md
index 1f79c657a..de66c704b 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -44,6 +44,7 @@ Changes from ns-3.37 to ns-3.38
 ### Changed behavior
 
 * (applications) **UdpClient** and **UdpEchoClient** MaxPackets attribute is aligned with other applications, in that the value zero means infinite packets.
+* (wifi) Control frames (specifically, BlockAckRequest and MU-BAR Trigger Frames) are stored in the wifi MAC queue and no longer in a dedicated BlockAckManager queue
 
 Changes from ns-3.36 to ns-3.37
 -------------------------------