diff --git a/Tools/AP_Periph/GCS_MAVLink.cpp b/Tools/AP_Periph/GCS_MAVLink.cpp
index 07bc148404..5502087678 100644
--- a/Tools/AP_Periph/GCS_MAVLink.cpp
+++ b/Tools/AP_Periph/GCS_MAVLink.cpp
@@ -67,7 +67,7 @@ uint8_t GCS_Periph::sysid_this_mav() const
     return periph.g.sysid_this_mav;
 }
 
-MAV_RESULT GCS_MAVLINK_Periph::handle_preflight_reboot(const mavlink_command_long_t &packet, const mavlink_message_t &msg)
+MAV_RESULT GCS_MAVLINK_Periph::handle_preflight_reboot(const mavlink_command_int_t &packet, const mavlink_message_t &msg)
 {
     hal.scheduler->delay(10);
     periph.prepare_reboot();
diff --git a/Tools/AP_Periph/GCS_MAVLink.h b/Tools/AP_Periph/GCS_MAVLink.h
index 98f39b8852..ce1f17b1ba 100644
--- a/Tools/AP_Periph/GCS_MAVLink.h
+++ b/Tools/AP_Periph/GCS_MAVLink.h
@@ -31,7 +31,7 @@ private:
     uint32_t telem_delay() const override { return 0; }
     void handleMessage(const mavlink_message_t &msg) override { handle_common_message(msg); }
     bool handle_guided_request(AP_Mission::Mission_Command &cmd) override { return true; }
-    MAV_RESULT handle_preflight_reboot(const mavlink_command_long_t &packet, const mavlink_message_t &msg) override;
+    MAV_RESULT handle_preflight_reboot(const mavlink_command_int_t &packet, const mavlink_message_t &msg) override;
     uint8_t sysid_my_gcs() const override;
 
 protected: