diff --git a/youtube_dl/extractor/wimp.py b/youtube_dl/extractor/wimp.py
index c27dda9440..3377a543ee 100644
--- a/youtube_dl/extractor/wimp.py
+++ b/youtube_dl/extractor/wimp.py
@@ -37,7 +37,7 @@ class WimpIE(InfoExtractor):
         video_id = mobj.group(1)
         webpage = self._download_webpage(url, video_id)
         video_url = self._search_regex(
-            r's1\.addVariable\("file",\s*"([^"]+)"\);', webpage, 'video URL')
+            r"'file'\s*:\s*'([^']+)'", webpage, 'video URL')
         if YoutubeIE.suitable(video_url):
             self.to_screen('Found YouTube video')
             return {