diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5b9bb2214a..799f215cc1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -28,6 +28,8 @@ IMPROVEMENTS:
   * provider/aws: Create RDS databases from snapshots [GH-2062]
   * provider/aws: Add support for restoring from Redis backup stored in S3 [GH-2634]
   * provider/aws: Add `maintenance_window` to ElastiCache cluster [GH-2642]
+  * provider/aws: Availability Zones are optional when specifying VPC Zone Identifiers in
+      Auto Scaling Groups updates [GH-2724]
   * provider/google: Add metadata_startup_script to google_compute_instance [GH-2375]
 
 ## 0.6.0 (June 30, 2015)