diff --git a/ArduCopter/GCS_Mavlink.pde b/ArduCopter/GCS_Mavlink.pde
index b1896d29b4..7ab35833ff 100644
--- a/ArduCopter/GCS_Mavlink.pde
+++ b/ArduCopter/GCS_Mavlink.pde
@@ -194,7 +194,7 @@ static NOINLINE void send_extended_status1(mavlink_channel_t chan)
     if (barometer.all_healthy()) {
         control_sensors_health |= MAV_SYS_STATUS_SENSOR_ABSOLUTE_PRESSURE;
     }
-    if (g.compass_enabled && compass.healthy(0) && ahrs.use_compass()) {
+    if (g.compass_enabled && compass.healthy() && ahrs.use_compass()) {
         control_sensors_health |= MAV_SYS_STATUS_SENSOR_3D_MAG;
     }
     if (gps.status() > AP_GPS::NO_GPS) {
diff --git a/ArduCopter/motors.pde b/ArduCopter/motors.pde
index dfcd187b49..e8976f0ef7 100644
--- a/ArduCopter/motors.pde
+++ b/ArduCopter/motors.pde
@@ -258,7 +258,7 @@ static bool pre_arm_checks(bool display_failure)
     // check Compass
     if ((g.arming_check == ARMING_CHECK_ALL) || (g.arming_check & ARMING_CHECK_COMPASS)) {
         // check the primary compass is healthy
-        if(!compass.healthy(0)) {
+        if(!compass.healthy()) {
             if (display_failure) {
                 gcs_send_text_P(SEVERITY_HIGH,PSTR("PreArm: Compass not healthy"));
             }