diff --git a/obmc/mapper/server.py b/obmc/mapper/server.py
index 8247568..fba4c9b 100644
--- a/obmc/mapper/server.py
+++ b/obmc/mapper/server.py
@@ -286,6 +286,7 @@
 
             for x in pending:
                 x()
+            self.IntrospectionComplete(owner)
 
     def discovery_error(self, owner, path, e):
         if owner in self.defer_signals:
@@ -737,6 +738,10 @@
 
         return self.filter_interfaces(list(objs.iteritems()), interfaces)
 
+    @dbus.service.signal(obmc.mapper.MAPPER_IFACE + '.Private', 's')
+    def IntrospectionComplete(self, name):
+        pass
+
 
 def server_main():
     dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)