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-rw-r--r--Objects/stringobject.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/Objects/stringobject.c b/Objects/stringobject.c
index 416457d..ca94d72 100644
--- a/Objects/stringobject.c
+++ b/Objects/stringobject.c
@@ -4017,7 +4017,7 @@ PyTypeObject PyString_Type = {
0, /* tp_setattro */
&string_as_buffer, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_CHECKTYPES |
- Py_TPFLAGS_BASETYPE, /* tp_flags */
+ Py_TPFLAGS_BASETYPE | Py_TPFLAGS_STRING_SUBCLASS, /* tp_flags */
string_doc, /* tp_doc */
0, /* tp_traverse */
0, /* tp_clear */