Index: twisted/protocols/tls.py
===================================================================
--- twisted/protocols/tls.py	(revision 45115)
+++ twisted/protocols/tls.py	(working copy)
@@ -705,7 +705,9 @@
         @rtype: L{OpenSSL.SSL.Connection}
         """
         context = self._oldStyleContextFactory.getContext()
-        return Connection(context, None)
+        connection = Connection(context, None)
+        connection.set_app_data(protocol)
+        return connection
 
 
     def serverConnectionForTLS(self, protocol):