diff --git a/VKernel/Kernel/sched/coroutine.vp b/VKernel/Kernel/sched/coroutine.vp
index 506e6a8..e399f07 100644
--- a/VKernel/Kernel/sched/coroutine.vp
+++ b/VKernel/Kernel/sched/coroutine.vp
@@ -81,7 +81,7 @@ class CoroutineManager:
     current_cid: t.CInt
     count: t.CInt
 
-    def __init__():
+    def __init__(self):
         global _coro_mgr_ptr
         _coro_mgr_ptr = c.Addr(_coro_mgr)
         m: CoroutineManager | t.CPtr = _coro_mgr_ptr