diff --git a/README.md b/README.md
index 1be46430b7..1ba1486d2d 100644
--- a/README.md
+++ b/README.md
@@ -384,10 +384,10 @@ ### Adding support for a new site
         import re
 
         from .common import InfoExtractor
-
-
+        
+        
         class YourExtractorIE(InfoExtractor):
-            _VALID_URL = r'https?://(?:www\.)yourextractor\.com/watch/(?P<id>[0-9]+)'
+            _VALID_URL = r'https?://(?:www\.)?yourextractor\.com/watch/(?P<id>[0-9]+)'
             _TEST = {
                 'url': 'http://yourextractor.com/watch/42',
                 'md5': 'TODO: md5 sum of the first 10KiB of the video file',