diff --git a/ChangeLog b/ChangeLog
index 0f9ccf0..c7bda6b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -7,6 +7,7 @@
 API Changes
    * net_connect() and net_bind() have a new 'proto' argument to choose
      between TCP and UDP, using the macros NET_PROTO_TCP or NET_PROTO_UDP.
+   * ssl_set_bio() now requires that p_send == p_recv.
 
 = PolarSSL 1.3.9 released 2014-10-20
 Security