diff --git a/Python/sysmodule.c b/Python/sysmodule.c
index ac49f7867a5cb3..f1f4492f83c7b1 100644
--- a/Python/sysmodule.c
+++ b/Python/sysmodule.c
@@ -2293,7 +2293,10 @@ PySys_AddWarnOption(const wchar_t *s)
     unicode = PyUnicode_FromWideChar(s, -1);
     if (unicode == NULL)
         return;
+_Py_COMP_DIAG_PUSH
+_Py_COMP_DIAG_IGNORE_DEPR_DECLS
     PySys_AddWarnOptionUnicode(unicode);
+_Py_COMP_DIAG_POP
     Py_DECREF(unicode);
 }