diff --git a/ArduSub/GCS_Mavlink.cpp b/ArduSub/GCS_Mavlink.cpp
index 8bbaba74cf..2da1cb7535 100644
--- a/ArduSub/GCS_Mavlink.cpp
+++ b/ArduSub/GCS_Mavlink.cpp
@@ -799,7 +799,7 @@ uint64_t GCS_MAVLINK_Sub::capabilities() const
         );
 }
 
-MAV_RESULT GCS_MAVLINK_Sub::handle_flight_termination(const mavlink_command_long_t &packet) {
+MAV_RESULT GCS_MAVLINK_Sub::handle_flight_termination(const mavlink_command_int_t &packet) {
     if (packet.param1 > 0.5f) {
         sub.arming.disarm(AP_Arming::Method::TERMINATION);
         return MAV_RESULT_ACCEPTED;
diff --git a/ArduSub/GCS_Mavlink.h b/ArduSub/GCS_Mavlink.h
index 17a3e77a8d..c185fa1b18 100644
--- a/ArduSub/GCS_Mavlink.h
+++ b/ArduSub/GCS_Mavlink.h
@@ -15,7 +15,7 @@ protected:
         return 0;
     };
 
-    MAV_RESULT handle_flight_termination(const mavlink_command_long_t &packet) override;
+    MAV_RESULT handle_flight_termination(const mavlink_command_int_t &packet) override;
 
     MAV_RESULT handle_command_do_set_roi(const Location &roi_loc) override;
     MAV_RESULT _handle_command_preflight_calibration_baro(const mavlink_message_t &msg) override;