diff --git a/mercurial/url.py b/mercurial/url.py
--- a/mercurial/url.py
+++ b/mercurial/url.py
@@ -438,6 +438,12 @@ if has_https:
                 keyfile = self.auth['key']
                 certfile = self.auth['cert']
 
+            # let host port take precedence
+            if ':' in host and '[' not in host or ']:' in host:
+                host, port = host.rsplit(':', 1)
+                if '[' in host:
+                    host = host[1:-1]
+
             return httpsconnection(host, port, keyfile, certfile, *args, **kwargs)
 
 # In python < 2.5 AbstractDigestAuthHandler raises a ValueError if