diff --git a/ArduPlane/GCS_Mavlink.cpp b/ArduPlane/GCS_Mavlink.cpp
index f01844fce2..273ed36d5c 100644
--- a/ArduPlane/GCS_Mavlink.cpp
+++ b/ArduPlane/GCS_Mavlink.cpp
@@ -694,7 +694,7 @@ bool GCS_MAVLINK_Plane::try_send_message(enum ap_message id)
         break;
 
     case MSG_RADIO_IN:
-        CHECK_PAYLOAD_SIZE(RC_CHANNELS_RAW);
+        CHECK_PAYLOAD_SIZE(RC_CHANNELS);
         send_radio_in(plane.receiver_rssi);
         break;