diff --git a/Python/bltinmodule.c b/Python/bltinmodule.c
index 745457fed98..8d1255ecac5 100644
--- a/Python/bltinmodule.c
+++ b/Python/bltinmodule.c
@@ -1325,7 +1325,7 @@ builtin_len(PyObject *self, PyObject *v)
 }
 
 PyDoc_STRVAR(len_doc,
-"len(module, object)\n\
+"len(object)\n\
 \n\
 Return the number of items of a sequence or mapping.");