diff --git a/Objects/genobject.c b/Objects/genobject.c
index af812c0..341f660 100644
--- a/Objects/genobject.c
+++ b/Objects/genobject.c
@@ -120,7 +120,7 @@
 }
 
 PyDoc_STRVAR(close_doc,
-"close(arg) -> raise GeneratorExit inside generator.");
+"close() -> raise GeneratorExit inside generator.");
 
 static PyObject *
 gen_close(PyGenObject *gen, PyObject *args)