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-rw-r--r--Modules/itertoolsmodule.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/Modules/itertoolsmodule.c b/Modules/itertoolsmodule.c
index d545028901..9505fd454b 100644
--- a/Modules/itertoolsmodule.c
+++ b/Modules/itertoolsmodule.c
@@ -614,7 +614,7 @@ itertools_teedataobject_impl(PyTypeObject *type, PyObject *it,
if (len == LINKCELLS) {
if (next != Py_None) {
- if (Py_TYPE(next) != &teedataobject_type)
+ if (!Py_IS_TYPE(next, &teedataobject_type))
goto err;
assert(tdo->nextlink == NULL);
Py_INCREF(next);