diff --git a/CHANGELOG.md b/CHANGELOG.md
index 792242b06..68ab56b84 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -43,6 +43,7 @@ FEATURES:
 
 IMPROVEMENTS:
  * provider/aws: Expose RDS DB Instance HostedZoneId attribute [GH-10000]
+ * provider/openstack: Instance `user_data` will now detect if input is already Base64-encode [GH-9966]
 
 BUG FIXES: