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-rw-r--r--Modules/_struct.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/Modules/_struct.c b/Modules/_struct.c
index 068c5d1..b61f9f6 100644
--- a/Modules/_struct.c
+++ b/Modules/_struct.c
@@ -1924,7 +1924,7 @@ s_sizeof(PyStructObject *self, void *unused)
Py_ssize_t size;
formatcode *code;
- size = sizeof(PyStructObject) + sizeof(formatcode);
+ size = _PyObject_SIZE(Py_TYPE(self)) + sizeof(formatcode);
for (code = self->s_codes; code->fmtdef != NULL; code++)
size += sizeof(formatcode);
return PyLong_FromSsize_t(size);