diff --git a/libpurple/protocols/jabber/jabber.c b/libpurple/protocols/jabber/jabber.c
--- a/libpurple/protocols/jabber/jabber.c
+++ b/libpurple/protocols/jabber/jabber.c
@@ -3980,10 +3980,15 @@ static gboolean xmpp_uri_handler(const c
    }

    return FALSE;
 }

+static void signed_on_cb(PurpleConnection *gc, void *data)
+{
+   printf("Callback called\n");
+}
+
 static void
 jabber_do_init(void)
 {
    GHashTable *ui_info = purple_core_get_ui_info();
    const gchar *ui_type;
@@ -4181,10 +4186,13 @@ static void jabber_init_protocol(PurpleP
    purple_signal_connect(protocol, "jabber-register-namespace-watcher",
            protocol, PURPLE_CALLBACK(jabber_iq_signal_register), NULL);
    purple_signal_connect(protocol, "jabber-unregister-namespace-watcher",
            protocol, PURPLE_CALLBACK(jabber_iq_signal_unregister), NULL);

+   purple_signal_connect(purple_connections_get_handle(), "signed-on",
+           protocol, PURPLE_CALLBACK(signed_on_cb), NULL);
+

    purple_signal_register(protocol, "jabber-receiving-xmlnode",
            purple_marshal_VOID__POINTER_POINTER, G_TYPE_NONE, 2,
            PURPLE_TYPE_CONNECTION,
            G_TYPE_POINTER); /* pointer to a PurpleXmlNode* */