diff --git a/CHANGELOG b/CHANGELOG
index a24cc956..aca55fd1 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -11,6 +11,12 @@ HISTORY
 
 (STABLE-1_1_0-RC1)
 
+  2004-10-16 Kieran Mansley - kjm25@cam.ac.uk
+  * tcp.c Add code to tcp_recved() to send an ACK (window update) immediately,
+	even if one is already pending, if the rcv_wnd is above a threshold
+	(currently TCP_WND/2). This avoids waiting for a timer to expire to send a
+	delayed ACK in order to open the window if the stack is only receiving data.
+
   2004-09-12 Kieran Mansley <kjm25@cam.ac.uk>
   * tcp*.* Retransmit time-out handling improvement by Sam Jansen.