diff --git a/Python/Python-ast.c b/Python/Python-ast.c
index 13fc5e0..ae3a396 100644
--- a/Python/Python-ast.c
+++ b/Python/Python-ast.c
@@ -1,4 +1,13 @@
-/* File automatically generated by Parser/asdl_c.py */
+/* File automatically generated by Parser/asdl_c.py. */
+
+
+/*
+   __version__ 53731.
+
+   This module must be committed separately after each AST grammar change;
+   The __version__ number is set to the revision number of the commit
+   containing the grammar change.
+*/
 
 #include "Python.h"
 #include "Python-ast.h"
@@ -3080,7 +3089,7 @@
         if (PyDict_SetItemString(d, "AST", (PyObject*)AST_type) < 0) return;
         if (PyModule_AddIntConstant(m, "PyCF_ONLY_AST", PyCF_ONLY_AST) < 0)
                 return;
-        if (PyModule_AddStringConstant(m, "__version__", "53704") < 0)
+        if (PyModule_AddStringConstant(m, "__version__", "53731") < 0)
                 return;
         if (PyDict_SetItemString(d, "mod", (PyObject*)mod_type) < 0) return;
         if (PyDict_SetItemString(d, "Module", (PyObject*)Module_type) < 0)