fix CHANGES for #4708
diff --git a/CHANGES.txt b/CHANGES.txt
index 44db06e..884eaba 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -1,5 +1,6 @@
 1.0.12
  * Switch from NBHM to CHM in MessagingService's callback map, which
+   prevents OOM in long-running instances (CASSANDRA-4708)
  * increase Xss to 160k to accomodate latest 1.6 JVMs (CASSANDRA-4602)
  * fix toString of hint destination tokens (CASSANDRA-4568)
  * (Hadoop) fix setting key length for old-style mapred api (CASSANDRA-4534)