diff --git a/ArduCopter/version.h b/ArduCopter/version.h
index 934986450a..02f933bee5 100644
--- a/ArduCopter/version.h
+++ b/ArduCopter/version.h
@@ -6,7 +6,7 @@
 
 #include "ap_version.h"
 
-#define THISFIRMWARE "ArduCopter V4.0.6-rc1"
+#define THISFIRMWARE "ArduCopter V4.0.6-rc2"
 
 // the following line is parsed by the autotest scripts
 #define FIRMWARE_VERSION 4,0,6,FIRMWARE_VERSION_TYPE_BETA