diff --git a/CHANGELOG-2.1.md b/CHANGELOG-2.1.md
index 03506f01da..437a2ff5c2 100644
--- a/CHANGELOG-2.1.md
+++ b/CHANGELOG-2.1.md
@@ -323,6 +323,8 @@ To get the diff between two versions, go to https://github.com/symfony/symfony/c
  * Added basic session meta-data to the session to record session create time,
    last updated time, and the lifetime of the session cookie that was provided
    to the client.
+ * Request::getClientIp() method doesn't take a parameter anymore but bases
+   itself on the trustProxy parameter.
 
 ### HttpKernel