diff --git a/ArduCopter/GCS_Mavlink.cpp b/ArduCopter/GCS_Mavlink.cpp
index 85a423a671..07f71f0815 100644
--- a/ArduCopter/GCS_Mavlink.cpp
+++ b/ArduCopter/GCS_Mavlink.cpp
@@ -1482,7 +1482,7 @@ void GCS_MAVLINK_Copter::handleMessage(mavlink_message_t* msg)
             break;
 
         default:
-            result = MAV_RESULT_UNSUPPORTED;
+            result = handle_command_long_message(packet);
             break;
         }