diff --git a/youtube_dl/extractor/vzaar.py b/youtube_dl/extractor/vzaar.py
index b7d02fca3..c1ffa46a4 100644
--- a/youtube_dl/extractor/vzaar.py
+++ b/youtube_dl/extractor/vzaar.py
@@ -97,7 +97,7 @@ class VzaarIE(InfoExtractor):
                 m3u8_id='hls', fatal=False)
             if hls_aes:
                 for f in m3u8_formats:
-                    f['_decryption_key_url'] = url_templ % ('goose', '') + qs
+                    f['extra_param_to_key_url'] = url_templ % ('goose', '') + qs
             formats.extend(m3u8_formats)
 
         self._sort_formats(formats)