diff --git a/packages/aws-cdk-lib/aws-lambda-event-sources/lib/stream.ts b/packages/aws-cdk-lib/aws-lambda-event-sources/lib/stream.ts
index cd78ca0520f4e..46b20d01e1787 100644
--- a/packages/aws-cdk-lib/aws-lambda-event-sources/lib/stream.ts
+++ b/packages/aws-cdk-lib/aws-lambda-event-sources/lib/stream.ts
@@ -63,7 +63,11 @@ export interface StreamEventSourceProps extends BaseStreamEventSourceProps {
    * * Minimum value of 60 seconds
    * * Maximum value of 7 days
    *
-   * @default - the retention period configured on the stream
+   * The default value is -1, which sets the maximum age to infinite.
+   * When the value is set to infinite, Lambda never discards old records.
+   * Record are valid until it expires in the event source.
+   *
+   * @default -1
    */
   readonly maxRecordAge?: Duration;
 
@@ -73,7 +77,11 @@ export interface StreamEventSourceProps extends BaseStreamEventSourceProps {
    * * Minimum value of 0
    * * Maximum value of 10000
    *
-   * @default - retry until the record expires
+   * The default value is -1, which sets the maximum number of retries to infinite.
+   * When MaximumRetryAttempts is infinite, Lambda retries failed records until
+   * the record expires in the event source.
+   *
+   * @default -1
    */
   readonly retryAttempts?: number;