diff --git a/ArduCopter/ArduCopter.pde b/ArduCopter/ArduCopter.pde
index 7a1fd304a5..0e139157d2 100644
--- a/ArduCopter/ArduCopter.pde
+++ b/ArduCopter/ArduCopter.pde
@@ -1,6 +1,6 @@
 /// -*- tab-width: 4; Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*-
 
-#define THISFIRMWARE "APM:Copter V3.3-dev"
+#define THISFIRMWARE "APM:Copter V3.3-rc4"
 /*
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by