diff --git a/codex/utils/asyncstatemachine.nim b/codex/utils/asyncstatemachine.nim
index 2d02110d..3f15af31 100644
--- a/codex/utils/asyncstatemachine.nim
+++ b/codex/utils/asyncstatemachine.nim
@@ -90,13 +90,13 @@ proc start*(machine: Machine, initialState: State) =
     machine.scheduled = newAsyncQueue[Event]()
 
   machine.started = true
-  machine.scheduler()
-    .track(machine)
-    .cancelled(proc() = trace("machine.scheduler cancelled, swallowing"))
-    .catch((err: ref CatchableError) =>
-      error("Error in scheduler", error = err.msg)
-    )
-  machine.schedule(Event.transition(machine.state, initialState))
+  try:
+    discard machine.scheduler().track(machine)
+    machine.schedule(Event.transition(machine.state, initialState))
+  except CancelledError as e:
+    discard
+  except CatchableError as e:
+    error("Error in scheduler", error = e.msg)
 
 proc stop*(machine: Machine) {.async.} =
   if not machine.started: