diff --git a/master.cfg b/master.cfg
index 17b64ea..61c7602 100644
--- a/master.cfg
+++ b/master.cfg
@@ -85,6 +85,9 @@ from buildbot.status.web import authz, auth
 ## The following class is a hack.  It is needed because Builbot's
 ## webserver treats everything it doesn't know as text/html.  Sigh...
 class WebStatusWithTextDefault(html.WebStatus):
+    def __init__ (self, **kwargs):
+        html.WebStatus.__init__ (self, kwargs)
+
     def setupSite(self):
         result = html.WebStatus.setupSite(self)
         self.site.resource.defaultType = r"text/plain"