diff --git a/telethon/client/auth.py b/telethon/client/auth.py
index 711b6fdb..f10a3f65 100644
--- a/telethon/client/auth.py
+++ b/telethon/client/auth.py
@@ -586,6 +586,9 @@ class AuthMethods:
 
                 # Important! You need to wait for the login to complete!
                 await qr_login.wait()
+
+                # If you have 2FA enabled, `wait` will raise `telethon.errors.SessionPasswordNeededError`.
+                # You should except that error and call `sign_in` with the password if this happens.
         """
         qr_login = custom.QRLogin(self, ignored_ids or [])
         await qr_login.recreate()