diff --git a/libraries/AP_Arming/AP_Arming.cpp b/libraries/AP_Arming/AP_Arming.cpp
index d1c42eeb34..307085fb7b 100644
--- a/libraries/AP_Arming/AP_Arming.cpp
+++ b/libraries/AP_Arming/AP_Arming.cpp
@@ -1796,6 +1796,7 @@ void AP_Arming::check_forced_logging(const AP_Arming::Method method)
         case Method::GCS_FAILSAFE_HOLDFAILED:
         case Method::PILOT_INPUT_FAILSAFE:
         case Method::DEADRECKON_FAILSAFE:
+        case Method::BLACKBOX:
             // keep logging for longer if disarmed for a bad reason
             AP::logger().set_long_log_persist(true);
             return;
diff --git a/libraries/AP_Arming/AP_Arming.h b/libraries/AP_Arming/AP_Arming.h
index 8eba06bd2d..b5d3c76521 100644
--- a/libraries/AP_Arming/AP_Arming.h
+++ b/libraries/AP_Arming/AP_Arming.h
@@ -75,6 +75,7 @@ public:
         TOYMODELANDFORCE = 31, // only disarm uses this...
         LANDING = 32, // only disarm uses this...
         DEADRECKON_FAILSAFE = 33, // only disarm uses this...
+        BLACKBOX = 34,
         UNKNOWN = 100,
     };