diff --git a/slixmpp/xmlstream/xmlstream.py b/slixmpp/xmlstream/xmlstream.py
index 98b0744c..d39a0f4b 100644
--- a/slixmpp/xmlstream/xmlstream.py
+++ b/slixmpp/xmlstream/xmlstream.py
@@ -302,7 +302,7 @@ async def _connect_routine(self):
         record = await self.pick_dns_answer(self.default_domain)
         if record is not None:
             host, address, dns_port = record
-            port = dns_port if dns_port else self.address[1]
+            port = self.address[1] if self.address[1] else dns_port
             self.address = (address, port)
             self._service_name = host
         else: