diff --git a/ArduCopter/GCS_Mavlink.cpp b/ArduCopter/GCS_Mavlink.cpp
index 32602be04a..2e01b66058 100644
--- a/ArduCopter/GCS_Mavlink.cpp
+++ b/ArduCopter/GCS_Mavlink.cpp
@@ -1884,6 +1884,7 @@ void GCS_MAVLINK_Copter::handleMessage(mavlink_message_t* msg)
         break;
     }
 
+    case MAVLINK_MSG_ID_GPS_RTCM_DATA:
     case MAVLINK_MSG_ID_GPS_INPUT:
     {
       result = MAV_RESULT_ACCEPTED;