diff --git a/res/dispctl.vala b/res/dispctl.vala
index d868f9c..2a28d07 100644
--- a/res/dispctl.vala
+++ b/res/dispctl.vala
@@ -804,7 +804,7 @@ int main(string[]? argv)
 
 
 	Application app = new DispCtl();
-	app.set_default();
+	Application.set_default(app);
 
 	Sigint.add_watch((app as DispCtl).stop_wireless_display);
 
diff --git a/res/gstencoder.vala b/res/gstencoder.vala
index 03d0bf2..9f83bbc 100644
--- a/res/gstencoder.vala
+++ b/res/gstencoder.vala
@@ -320,8 +320,13 @@ internal class GstEncoder : DispdEncoder, GLib.Object
 		conn = yield Bus.get(BusType.SESSION);
 		conn.register_object(DispdEncoder.OBJECT_PATH, this as DispdEncoder);
 
+#if VALA_0_54
+                string bus_info = "%s\n%s".printf(conn.unique_name,
+                                               BusType.SESSION.get_address_sync ());
+#else
 		string bus_info = "%s\n%s".printf(conn.unique_name,
 						BusType.get_address_sync(BusType.SESSION));
+#endif
 		/* we are ready, tell parent how to communicate with us */
 		ssize_t r = Posix.write(3, (void *) bus_info.data, bus_info.length);
 		if(0 > r) {