Issue #13783: the PEP 380 implementation no longer expands the public C API
diff --git a/Include/genobject.h b/Include/genobject.h
index 25f6c33..ed451ba 100644
--- a/Include/genobject.h
+++ b/Include/genobject.h
@@ -34,7 +34,7 @@
PyAPI_FUNC(PyObject *) PyGen_New(struct _frame *);
PyAPI_FUNC(int) PyGen_NeedsFinalizing(PyGenObject *);
-PyAPI_FUNC(int) PyGen_FetchStopIterationValue(PyObject **);
+PyAPI_FUNC(int) _PyGen_FetchStopIterationValue(PyObject **);
PyObject *_PyGen_Send(PyGenObject *, PyObject *);
#ifdef __cplusplus