diff --git a/examples/download_file_example.py b/examples/download_file_example.py
index d9003d1..157cdc7 100644
--- a/examples/download_file_example.py
+++ b/examples/download_file_example.py
@@ -5,7 +5,7 @@ CHAT_ID = 'YOUR CHAT ID'
 
 bot = telebot.TeleBot(TOKEN)
 
-ret_msg = bot.send_voice(CHAT_ID, open('tests/test_data/record.ogg'))
+ret_msg = bot.send_voice(CHAT_ID, open('tests/test_data/record.ogg', 'rb'))
 
 file_info = bot.get_file(ret_msg.voice.file_id)