diff --git a/APMrover2/version.h b/APMrover2/version.h
index c3e96f8ee9..8f90115b24 100644
--- a/APMrover2/version.h
+++ b/APMrover2/version.h
@@ -9,7 +9,7 @@
 #define THISFIRMWARE "ArduRover V4.0.0-dev"
 
 // the following line is parsed by the autotest scripts
-#define FIRMWARE_VERSION 4,6,0,FIRMWARE_VERSION_TYPE_DEV
+#define FIRMWARE_VERSION 4,0,0,FIRMWARE_VERSION_TYPE_DEV
 
 #define FW_MAJOR 4
 #define FW_MINOR 0