diff --git a/ArduPlane/system.cpp b/ArduPlane/system.cpp
index 49cf637c52..5d6e5dc900 100644
--- a/ArduPlane/system.cpp
+++ b/ArduPlane/system.cpp
@@ -55,7 +55,7 @@ void Plane::init_ardupilot()
 
     // initialise serial ports
     serial_manager.init();
-    gcs().chan(0).setup_uart(serial_manager, AP_SerialManager::SerialProtocol_MAVLink, 0);
+    gcs().chan(0).setup_uart(AP_SerialManager::SerialProtocol_MAVLink, 0);
 
 
     // Register mavlink_delay_cb, which will run anytime you have
@@ -96,7 +96,7 @@ void Plane::init_ardupilot()
     rpm_sensor.init();
 
     // setup telem slots with serial ports
-    gcs().setup_uarts(serial_manager);
+    gcs().setup_uarts();
 
 #if OSD_ENABLED == ENABLED
     osd.init();