diff --git a/thug/Classifier/BaseClassifier.py b/thug/Classifier/BaseClassifier.py
index f4d607702a..0ed704a9e2 100644
--- a/thug/Classifier/BaseClassifier.py
+++ b/thug/Classifier/BaseClassifier.py
@@ -94,7 +94,7 @@ def add_filter(self, filter_file):
 
     def discard_meta_domain_whitelist(self, url, values):
         p_url  = urlparse(url)
-        netloc = p_url.netloc.lower()
+        netloc = p_url.netloc.split(':')[0].lower() # Remove the port from netloc, if present
 
         for value in values.split(','):
             domain = value.lower().strip()