diff --git a/libraries/AP_Vehicle/AP_Vehicle_Type.h b/libraries/AP_Vehicle/AP_Vehicle_Type.h
index 027c15d760..52d3b0d276 100644
--- a/libraries/AP_Vehicle/AP_Vehicle_Type.h
+++ b/libraries/AP_Vehicle/AP_Vehicle_Type.h
@@ -30,6 +30,7 @@
 #define APM_BUILD_AP_Periph      9
 #define APM_BUILD_AP_DAL_Standalone 10
 #define APM_BUILD_AP_Bootloader  11
+#define APM_BUILD_Blimp      12
 
 #ifndef APM_BUILD_DIRECTORY
 #define APM_BUILD_DIRECTORY APM_BUILD_UNKNOWN