diff --git a/flower/utils/broker.py b/flower/utils/broker.py
index c255962a5..4ee73349c 100644
--- a/flower/utils/broker.py
+++ b/flower/utils/broker.py
@@ -50,7 +50,7 @@ def __init__(self, broker_url, http_api, io_loop=None, **kwargs):
         self.password = self.password or 'guest'
 
         if not http_api:
-            http_api = "http://{username}:{password}@{host}:{port}/api/{vhost}".format(
+            http_api = "http://{username}:{password}@{host}:15672/api/{vhost}".format(
                 username=self.username, password=self.password,
                 host=self.host, port=self.port, vhost=self.vhost
             )