PEP 465: a dedicated infix operator for matrix multiplication (closes #21176)
diff --git a/Objects/typeslots.inc b/Objects/typeslots.inc
index caa1e03..2ed99d8 100644
--- a/Objects/typeslots.inc
+++ b/Objects/typeslots.inc
@@ -73,3 +73,5 @@
 offsetof(PyHeapTypeObject, ht_type.tp_members),
 offsetof(PyHeapTypeObject, ht_type.tp_getset),
 offsetof(PyHeapTypeObject, ht_type.tp_free),
+offsetof(PyHeapTypeObject, as_number.nb_matrix_multiply),
+offsetof(PyHeapTypeObject, as_number.nb_inplace_matrix_multiply),