diff --git a/ChangeLog.asciidoc b/ChangeLog.asciidoc
index 4dc364ebe..c46c4e496 100644
--- a/ChangeLog.asciidoc
+++ b/ChangeLog.asciidoc
@@ -30,6 +30,7 @@ http://weechat.org/files/releasenotes/ReleaseNotes-devel.html[release notes]
 
 * core: fix translation of message displayed after /upgrade
 * irc: fix translation of CTCP PING reply (closes #137)
+* relay: remove "::ffff:" from IPv4-mapped IPv6 client address
 
 == Version 1.0.1 (2014-09-28)
 
diff --git a/ReleaseNotes.asciidoc b/ReleaseNotes.asciidoc
index 06d02fd13..f7dab6d1e 100644
--- a/ReleaseNotes.asciidoc
+++ b/ReleaseNotes.asciidoc
@@ -17,6 +17,14 @@ http://weechat.org/files/changelog/ChangeLog-devel.html[ChangeLog]
 
 == Version 1.1 (under dev)
 
+=== IPv4-mapped IPv6 client address in relay
+
+The string "::ffff:" has been removed from IPv4-mapped IPv6 client address
+in relay plugin.
+
+If you are using "::ffff:" in option 'relay.network.allowed_ips', you can
+remove it.
+
 === Temporary servers disabled by default with /connect
 
 Creating a temporary server with command `/connect <address>` or