Issue #28959: Added private macro PyDict_GET_SIZE for retrieving the size of dict.
diff --git a/Modules/_elementtree.c b/Modules/_elementtree.c
index ba827e6..9e6f63b 100644
--- a/Modules/_elementtree.c
+++ b/Modules/_elementtree.c
@@ -150,7 +150,7 @@
 static int
 is_empty_dict(PyObject *obj)
 {
-    return PyDict_CheckExact(obj) && PyDict_Size(obj) == 0;
+    return PyDict_CheckExact(obj) && PyDict_GET_SIZE(obj) == 0;
 }