diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7ff05b5ab..e0ce20b5f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,9 @@ branch for the next major version of Terraform.
 
 ## 0.9.0-beta3 (unreleased)
 
+BACKWARDS INCOMPATIBILITIES / NOTES:
 
+ * provider/aws: `aws_codebuild_project` renamed 'timeout' to 'build_timeout' [GH-12503]
 
 ## 0.9.0-beta2 (March 2, 2017)