diff --git a/libraries/AP_Arming/AP_Arming_config.h b/libraries/AP_Arming/AP_Arming_config.h
index 748bb49890..b8b28f3cd1 100644
--- a/libraries/AP_Arming/AP_Arming_config.h
+++ b/libraries/AP_Arming/AP_Arming_config.h
@@ -2,6 +2,10 @@
 
 #include <AP_HAL/AP_HAL_Boards.h>
 
+#ifndef AP_ARMING_ENABLED
+#define AP_ARMING_ENABLED 1
+#endif
+
 #ifndef AP_ARMING_AUX_AUTH_ENABLED
 #define AP_ARMING_AUX_AUTH_ENABLED AP_SCRIPTING_ENABLED
 #endif