diff --git a/a_sync/executor.py b/a_sync/executor.py
index 57e473ae..d00eaf71 100644
--- a/a_sync/executor.py
+++ b/a_sync/executor.py
@@ -115,7 +115,7 @@ def submit(self, fn: Callable[P, T], *args: P.args, **kwargs: P.kwargs) -> "asyn
                 fut.set_exception(e)
         else:
             fut = wrap_future(self._super_submit(fn, *args, **kwargs))  # type: ignore [assignment]
-            self._start_debug_daemon(fut, fn, *args, **kwargs)
+            self._ensure_debug_daemon(fut, fn, *args, **kwargs)
         return fut
 
     def __repr__(self) -> str: