diff --git a/CHANGELOG_PENDING.md b/CHANGELOG_PENDING.md
index 8a1927a39ca..5ec03455dae 100644
--- a/CHANGELOG_PENDING.md
+++ b/CHANGELOG_PENDING.md
@@ -1,5 +1,6 @@
 ### SDK Features
 
 ### SDK Enhancements
+* `aws/signer/v4`: Optimize V4 signer's header duplicate space stripping. [#1417](https://github.com/aws/aws-sdk-go/pull/1417)
 
 ### SDK Bugs