diff --git a/Python/pythonrun.c b/Python/pythonrun.c
index a4c986e..49e616e 100644
--- a/Python/pythonrun.c
+++ b/Python/pythonrun.c
@@ -86,7 +86,7 @@
 int Py_VerboseFlag; /* Needed by import.c */
 int Py_InteractiveFlag; /* Needed by Py_FdIsInteractive() below */
 int Py_NoSiteFlag; /* Suppress 'import site' */
-int Py_UseClassExceptionsFlag = 1; /* Needed by bltinmodule.c */
+int Py_UseClassExceptionsFlag = 1; /* Needed by bltinmodule.c: deprecated */
 int Py_FrozenFlag; /* Needed by getpath.c */
 int Py_UnicodeFlag = 0; /* Needed by compile.c */