diff --git a/packages/aws-cdk-lib/aws-events/lib/event-pattern.ts b/packages/aws-cdk-lib/aws-events/lib/event-pattern.ts
index 93076c7b51726..c4f37bdffe055 100644
--- a/packages/aws-cdk-lib/aws-events/lib/event-pattern.ts
+++ b/packages/aws-cdk-lib/aws-events/lib/event-pattern.ts
@@ -262,6 +262,9 @@ export class Match implements IResolvable {
  * - Number matching is at the string representation level. For example, 300,
  *   300.0, and 3.0e2 are not considered equal.
  *
+ * For custom events, some optional properties are required. For more information, see
+ * [Minimum information needed for a valid custom event](https://docs.aws.amazon.com/eventbridge/latest/userguide/eb-events-structure.html#eb-custom-event).
+ *
  * @see https://docs.aws.amazon.com/AmazonCloudWatch/latest/events/CloudWatchEventsandEventPatterns.html
  */
 export interface EventPattern {