diff --git a/Lib/smtpd.py b/Lib/smtpd.py
index d828c5f12fe..f90fae8e15a 100755
--- a/Lib/smtpd.py
+++ b/Lib/smtpd.py
@@ -610,7 +610,8 @@ class SMTPServer(asyncore.dispatcher):
         self._decode_data = decode_data
         asyncore.dispatcher.__init__(self, map=map)
         try:
-            gai_results = socket.getaddrinfo(*localaddr)
+            gai_results = socket.getaddrinfo(*localaddr,
+                                             type=socket.SOCK_STREAM)
             self.create_socket(gai_results[0][0], gai_results[0][1])
             # try to re-use a server port if possible
             self.set_reuse_addr()