diff --git a/Lib/asyncio/unix_events.py b/Lib/asyncio/unix_events.py
index ac4519acc4307b..0d4ba72603e675 100644
--- a/Lib/asyncio/unix_events.py
+++ b/Lib/asyncio/unix_events.py
@@ -1443,8 +1443,6 @@ def _init_watcher(self):
         with events._lock:
             if self._watcher is None:  # pragma: no branch
                 self._watcher = ThreadedChildWatcher()
-                if threading.current_thread() is threading.main_thread():
-                    self._watcher.attach_loop(self._local._loop)
 
     def set_event_loop(self, loop):
         """Set the event loop.