Rename _Py_identifier to _Py_IDENTIFIER.
diff --git a/Modules/_csv.c b/Modules/_csv.c
index 59c74e7..627c3b1 100644
--- a/Modules/_csv.c
+++ b/Modules/_csv.c
@@ -1317,7 +1317,7 @@
 {
     PyObject * output_file, * dialect = NULL;
     WriterObj * self = PyObject_GC_New(WriterObj, &Writer_Type);
-    _Py_identifier(write);
+    _Py_IDENTIFIER(write);
 
     if (!self)
         return NULL;