diff --git a/libraries/AP_Vehicle/AP_Vehicle_Type.h b/libraries/AP_Vehicle/AP_Vehicle_Type.h
index 51e29c92b6..cd1a6e4341 100644
--- a/libraries/AP_Vehicle/AP_Vehicle_Type.h
+++ b/libraries/AP_Vehicle/AP_Vehicle_Type.h
@@ -27,6 +27,7 @@
 #define APM_BUILD_Replay         6
 #define APM_BUILD_ArduSub        7
 #define APM_BUILD_iofirmware     8
+#define APM_BUILD_AP_Periph      9
 
 /*
   using this macro catches cases where we try to check vehicle type on