diff --git a/CHANGELOG.md b/CHANGELOG.md
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--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
+## 3.65.0 (Unreleased)
+
 ## 3.64.2 (November 05, 2021)
 
+* provider: Additional fixes to allow setting endpoints with non-standard, legacy keys. ([#21657](https://github.com/hashicorp/terraform-provider-aws/issues/21657))
+
 ## 3.64.1 (November 05, 2021)
 
 BUG FIXES: