diff --git a/libraries/GCS_MAVLink/MissionItemProtocol.cpp b/libraries/GCS_MAVLink/MissionItemProtocol.cpp
index 5667578ad064e..69a5eab7dd78c 100644
--- a/libraries/GCS_MAVLink/MissionItemProtocol.cpp
+++ b/libraries/GCS_MAVLink/MissionItemProtocol.cpp
@@ -315,7 +315,7 @@ void MissionItemProtocol::handle_mission_item(const mavlink_message_t &msg, cons
         return;
     }
     // if we have enough space, then send the next WP request immediately
-    if (HAVE_PAYLOAD_SPACE(link->get_chan(), MISSION_REQUEST)) {
+    if (HAVE_PAYLOAD_SPACE(link->get_chan(), MISSION_REQUEST_INT)) {
         queued_request_send();
     } else {
         link->send_message(next_item_ap_message_id());
@@ -368,8 +368,8 @@ void MissionItemProtocol::queued_request_send()
         INTERNAL_ERROR(AP_InternalError::error_t::gcs_bad_missionprotocol_link);
         return;
     }
-    CHECK_PAYLOAD_SIZE2_VOID(link->get_chan(), MISSION_REQUEST);
-    mavlink_msg_mission_request_send(
+    CHECK_PAYLOAD_SIZE2_VOID(link->get_chan(), MISSION_REQUEST_INT);
+    mavlink_msg_mission_request_int_send(
         link->get_chan(),
         dest_sysid,
         dest_compid,