diff --git a/libraries/AP_Vehicle/AP_Vehicle_Type.h b/libraries/AP_Vehicle/AP_Vehicle_Type.h
index 74c2dc0f9f..51e29c92b6 100644
--- a/libraries/AP_Vehicle/AP_Vehicle_Type.h
+++ b/libraries/AP_Vehicle/AP_Vehicle_Type.h
@@ -26,6 +26,7 @@
 #define APM_BUILD_UNKNOWN        5
 #define APM_BUILD_Replay         6
 #define APM_BUILD_ArduSub        7
+#define APM_BUILD_iofirmware     8
 
 /*
   using this macro catches cases where we try to check vehicle type on