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-rw-r--r--youtube_dl/extractor/twitch.py4
1 files changed, 3 insertions, 1 deletions
diff --git a/youtube_dl/extractor/twitch.py b/youtube_dl/extractor/twitch.py
index 26661fdf6..401615683 100644
--- a/youtube_dl/extractor/twitch.py
+++ b/youtube_dl/extractor/twitch.py
@@ -51,7 +51,9 @@ class TwitchBaseIE(InfoExtractor):
expected=True)
def _call_api(self, path, item_id, *args, **kwargs):
- kwargs.setdefault('headers', {})['Client-ID'] = self._CLIENT_ID
+ headers = kwargs.get('headers', {}).copy()
+ headers['Client-ID'] = self._CLIENT_ID
+ kwargs['headers'] = headers
response = self._download_json(
'%s/%s' % (self._API_BASE, path), item_id,
*args, **compat_kwargs(kwargs))