diff --git a/ArduSub/sensors.cpp b/ArduSub/sensors.cpp
index 6fdcf88f94..130ffde76c 100644
--- a/ArduSub/sensors.cpp
+++ b/ArduSub/sensors.cpp
@@ -180,7 +180,7 @@ void Sub::read_battery(void)
     }
 
     // update motors with voltage and current
-    if (battery.get_type() != AP_BattMonitor::BattMonitor_TYPE_NONE) {
+    if (battery.get_type() != AP_BattMonitor_Params::BattMonitor_TYPE_NONE) {
         motors.set_voltage(battery.voltage());
     }