diff --git a/PC/_subprocess.c b/PC/_subprocess.c
index 78ceb7d..0e4ee5f 100644
--- a/PC/_subprocess.c
+++ b/PC/_subprocess.c
@@ -108,8 +108,8 @@
 }
 
 static PyMethodDef sp_handle_methods[] = {
-	{"Detach", (PyCFunction) sp_handle_detach, 1},
-	{"Close", (PyCFunction) sp_handle_close, 1},
+	{"Detach", (PyCFunction) sp_handle_detach, METH_VARARGS},
+	{"Close",  (PyCFunction) sp_handle_close,  METH_VARARGS},
 	{NULL, NULL}
 };