Rename _Py_identifier to _Py_IDENTIFIER.
diff --git a/Python/ast.c b/Python/ast.c
index 9872979..48aef48 100644
--- a/Python/ast.c
+++ b/Python/ast.c
@@ -527,7 +527,7 @@
 static identifier
 new_identifier(const char* n, PyArena *arena)
 {
-    _Py_identifier(normalize);
+    _Py_IDENTIFIER(normalize);
     PyObject* id = PyUnicode_DecodeUTF8(n, strlen(n), NULL);
     if (!id || PyUnicode_READY(id) == -1)
         return NULL;