diff --git a/src/runner.ts b/src/runner.ts
index 308d358f..017227ce 100644
--- a/src/runner.ts
+++ b/src/runner.ts
@@ -445,7 +445,7 @@ export class GitHubRunners extends Construct implements ec2.IConnectable {
       this,
       'Runner Orchestrator',
       {
-        definition: queueIdleReaperTask.next(runProviders),
+        definitionBody: stepfunctions.DefinitionBody.fromChainable(queueIdleReaperTask.next(runProviders)),
         logs: logOptions,
       },
     );