From 568e2923eb08a952d9bacf0f8cff82f1c7a0c4ea Mon Sep 17 00:00:00 2001
From: Raphael Michel <mail@raphaelmichel.de>
Date: Sat, 12 Oct 2019 21:55:49 +0200
Subject: [PATCH] Ensure a system ID exists when TAN mechanisms are fetched

---
 fints/client.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fints/client.py b/fints/client.py
index 310a584..182b6dd 100644
--- a/fints/client.py
+++ b/fints/client.py
@@ -1120,6 +1120,7 @@ class FinTS3PinTanClient(FinTS3Client):
 
     def fetch_tan_mechanisms(self):
         self.set_tan_mechanism('999')
+        self._ensure_system_id()
         with self._new_dialog():
             return self.get_current_tan_mechanism()
 
-- 
2.47.2