diff -r 6c2e2de5ab8e Lib/asyncio/base_events.py
--- a/Lib/asyncio/base_events.py	Sat Jul 30 23:51:13 2016 -0700
+++ b/Lib/asyncio/base_events.py	Mon Aug 01 23:41:26 2016 +0100
@@ -919,9 +919,15 @@
             else:
                 hosts = host
 
+            if (isinstance(port, (int, str)) or
+                      not isinstance(port, collections.Iterable)):
+                ports = [port]
+            else:
+                ports = port
+
             fs = [self._create_server_getaddrinfo(host, port, family=family,
                                                   flags=flags)
-                  for host in hosts]
+                  for port in ports for host in hosts]
             infos = yield from tasks.gather(*fs, loop=self)
             infos = set(itertools.chain.from_iterable(infos))