1 files changed, 1 insertions, 1 deletions
diff --git a/Include/cpython/objimpl.h b/Include/cpython/objimpl.h
index ebb3e234e3..8e3c964cf4 100644
--- a/Include/cpython/objimpl.h
+++ b/Include/cpython/objimpl.h
@@ -30,7 +30,7 @@ static inline PyVarObject*
 _PyObject_INIT_VAR(PyVarObject *op, PyTypeObject *typeobj, Py_ssize_t size)
 {
     assert(op != NULL);
-    Py_SIZE(op) = size;
+    Py_SET_SIZE(op, size);
     PyObject_INIT((PyObject *)op, typeobj);
     return op;
 }