diff --git a/ArduCopter/version.h b/ArduCopter/version.h
index ab63cfca55..0341b91613 100644
--- a/ArduCopter/version.h
+++ b/ArduCopter/version.h
@@ -2,8 +2,8 @@
 
 #include "ap_version.h"
 
-#define THISFIRMWARE "APM:Copter V3.4.1"
-#define FIRMWARE_VERSION 3,4,1,FIRMWARE_VERSION_TYPE_OFFICIAL
+#define THISFIRMWARE "APM:Copter V3.4.2-rc1"
+#define FIRMWARE_VERSION 3,4,1,FIRMWARE_VERSION_TYPE_RC
 
 #ifndef GIT_VERSION
 #define FIRMWARE_STRING THISFIRMWARE