diff --git a/packages/aws-cdk-lib/aws-backup/lib/rule.ts b/packages/aws-cdk-lib/aws-backup/lib/rule.ts
index fe546619bddb3..566f1edbde1ac 100644
--- a/packages/aws-cdk-lib/aws-backup/lib/rule.ts
+++ b/packages/aws-cdk-lib/aws-backup/lib/rule.ts
@@ -10,7 +10,7 @@ export interface BackupPlanRuleProps {
    * The duration after a backup job is successfully started before it must be
    * completed or it is canceled by AWS Backup.
    *
-   * @default - 8 hours
+   * @default - 7 days
    */
   readonly completionWindow?: Duration;