diff --git a/telegram/bot.py b/telegram/bot.py
index 571329a85..172847482 100644
--- a/telegram/bot.py
+++ b/telegram/bot.py
@@ -421,7 +421,7 @@ class Bot(TelegramObject):
                      chat_id,
                      document,
                      filename=None,
-                     caption=None
+                     caption=None,
                      **kwargs):
         """Use this method to send general files.