diff --git a/youtube_dl/extractor/tasvideos.py b/youtube_dl/extractor/tasvideos.py
index ee6e7e48d..ba61e07cb 100644
--- a/youtube_dl/extractor/tasvideos.py
+++ b/youtube_dl/extractor/tasvideos.py
@@ -19,7 +19,7 @@ class TasVideosIE(InfoExtractor):
         video_id = self._match_id(url)
         webpage = self._download_webpage(url, video_id)
         video_url = "http://www." + self._search_regex(
-            r'<a [^>]+(?P<URL>archive\.org\/download[^<]+(?:mkv|mp4|avi))[^<]+<\/a>',
+            r'<a [^>]+(?P<URL>archive\.org\/download[^<]+\.(?:mkv|mp4|avi))[^<]+<\/a>',
             webpage, 'video url')
         title = self._search_regex(
             r'<span title="Movie[^"]+">(?P<TITLE>[^<]+)<\/span>', webpage,