diff --git a/ArduCopter/version.h b/ArduCopter/version.h
index 598b6ebd1de3a..db8d1077465ba 100644
--- a/ArduCopter/version.h
+++ b/ArduCopter/version.h
@@ -6,7 +6,7 @@
 
 #include "ap_version.h"
 
-#define THISFIRMWARE "ArduCopter V4.4.0"
+#define THISFIRMWARE "ArduCopter V4.4.0-Cal1"
 
 // the following line is parsed by the autotest scripts
 #define FIRMWARE_VERSION 4,4,0,FIRMWARE_VERSION_TYPE_OFFICIAL