diff --git a/youtube_dl/extractor/iprima.py b/youtube_dl/extractor/iprima.py
index c733f0eaa..fc9f71397 100644
--- a/youtube_dl/extractor/iprima.py
+++ b/youtube_dl/extractor/iprima.py
@@ -55,7 +55,7 @@ class IPrimaIE(InfoExtractor):
             if filename == 'null':
                 continue
 
-            real_id = self._search_regex(r'Prima-(?:WEB-)(\d+)-\d+_\d+|\d+-(\d+)_\d+', filename, 'real video id')
+            real_id = self._search_regex(r'Prima-WEB-(\d+)-\d+_\d+|\d+-(\d+)_\d+', filename, 'real video id')
 
             if format_id == 'lq':
                 quality = 0