diff --git a/libraries/GCS_MAVLink/GCS_Common.cpp b/libraries/GCS_MAVLink/GCS_Common.cpp
index 4b7fcef124..6706933c15 100644
--- a/libraries/GCS_MAVLink/GCS_Common.cpp
+++ b/libraries/GCS_MAVLink/GCS_Common.cpp
@@ -1401,7 +1401,7 @@ void GCS_MAVLINK::send_parameter_value_all(const char *param_name, ap_var_type p
 void GCS_MAVLINK::send_battery2(const AP_BattMonitor &battery)
 {
     if (battery.num_instances() > 1) {
-        mavlink_msg_battery2_send(chan, battery.voltage2()*1000, battery.current_amps(1));
+        mavlink_msg_battery2_send(chan, battery.voltage(1)*1000, battery.current_amps(1));
     }
 }