diff --git a/ArduCopter/system.cpp b/ArduCopter/system.cpp
index b21b1a4c05..f237df3edb 100644
--- a/ArduCopter/system.cpp
+++ b/ArduCopter/system.cpp
@@ -52,7 +52,7 @@ void Copter::init_ardupilot()
     serial_manager.init();
 
     // setup first port early to allow BoardConfig to report errors
-    gcs().chan(0).setup_uart(AP_SerialManager::SerialProtocol_MAVLink, 0);
+    gcs().chan(0).setup_uart(0);
 
 
     // Register mavlink_delay_cb, which will run anytime you have