diff --git a/packages/@aws-cdk/aws-lambda/lib/log-retention.ts b/packages/@aws-cdk/aws-lambda/lib/log-retention.ts
index 8e7d640948083..6c5fec2da7cd9 100644
--- a/packages/@aws-cdk/aws-lambda/lib/log-retention.ts
+++ b/packages/@aws-cdk/aws-lambda/lib/log-retention.ts
@@ -48,7 +48,7 @@ export interface LogRetentionRetryOptions {
   /**
    * The base duration to use in the exponential backoff for operation retries.
    *
-   * @default - 100 milliseconds (AWS SDK default)
+   * @default Duration.millis(100) (AWS SDK default)
    */
   readonly base?: cdk.Duration;
 }