diff --git a/src/core/mavlink_mission_transfer.cpp b/src/core/mavlink_mission_transfer.cpp
index 08be85b635..da64240b90 100644
--- a/src/core/mavlink_mission_transfer.cpp
+++ b/src/core/mavlink_mission_transfer.cpp
@@ -286,6 +286,7 @@ void MAVLinkMissionTransfer::UploadWorkItem::process_mission_request(
         mavlink_mission_request_t request;
         mavlink_msg_mission_request_decode(&request_message, &request);
 
+        // FIXME: this will mess with the sequence number.
         mavlink_message_t request_int_message;
         mavlink_msg_mission_request_int_pack(
             request_message.sysid,