diff --git a/ArduCopter/system.cpp b/ArduCopter/system.cpp
index 853e93231e..b21b1a4c05 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(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
@@ -85,7 +85,7 @@ void Copter::init_ardupilot()
     barometer.init();
 
     // setup telem slots with serial ports
-    gcs().setup_uarts(serial_manager);
+    gcs().setup_uarts();
 
 #if OSD_ENABLED == ENABLED
     osd.init();