diff --git a/packages/webaudio/scheduler.mjs b/packages/webaudio/scheduler.mjs
index 3f41266d..8b476560 100644
--- a/packages/webaudio/scheduler.mjs
+++ b/packages/webaudio/scheduler.mjs
@@ -1,4 +1,5 @@
 import ClockWorker from './clockworker.mjs';
+import { State, TimeSpan } from '@strudel.cycles/core';
 
 class Scheduler {
   worker;