diff --git a/youtube_dl/extractor/twitch.py b/youtube_dl/extractor/twitch.py
index 4373337f0..d8b98803e 100644
--- a/youtube_dl/extractor/twitch.py
+++ b/youtube_dl/extractor/twitch.py
@@ -437,7 +437,7 @@ class TwitchVideosBaseIE(TwitchPlaylistBaseIE):
 
 class TwitchCollectionsIE(TwitchBaseIE):
     IE_NAME = 'twitch:collections'
-    _VALID_URL = r'%s/collections/(?P<id>[\w\d]+)' % TwitchBaseIE._VALID_URL_BASE
+    _VALID_URL = r'%s/collections/(?P<id>[\w\d\-]+)' % TwitchBaseIE._VALID_URL_BASE
 
     _TESTS = [{
         'url': 'https://www.twitch.tv/collections/myIbIFkZphQSbQ',