diff --git a/src/modules/sensors/sensors.cpp b/src/modules/sensors/sensors.cpp
index 2b275f6521..60e1a9aabb 100644
--- a/src/modules/sensors/sensors.cpp
+++ b/src/modules/sensors/sensors.cpp
@@ -832,8 +832,11 @@ Sensors::parameters_update()
 		_parameters.battery_voltage_scaling = 0.0082f;
 		#elif CONFIG_ARCH_BOARD_AEROCORE
 		_parameters.battery_voltage_scaling = 0.0063f;
-		#else
+		#elif CONFIG_ARCH_BOARD_PX4FMU_V2
 		_parameters.battery_voltage_scaling = 0.00459340659f;
+		#else
+		/* ensure a missing default trips a low voltage lockdown */
+		_parameters.battery_voltage_scaling = 0.00001f;
 		#endif
 	}