diff --git a/packages/@aws-cdk/aws-config/lib/rule.ts b/packages/@aws-cdk/aws-config/lib/rule.ts
index 4aff1cb699a58..ac4044ac4ae99 100644
--- a/packages/@aws-cdk/aws-config/lib/rule.ts
+++ b/packages/@aws-cdk/aws-config/lib/rule.ts
@@ -1259,6 +1259,9 @@ export class ManagedRuleIdentifiers {
    * @see https://docs.aws.amazon.com/config/latest/developerguide/wafv2-logging-enabled.html
    */
   public static readonly WAFV2_LOGGING_ENABLED = 'WAFV2_LOGGING_ENABLED';
+
+  // utility class
+  private constructor() { }
 }
 
 /**