diff --git a/src/drivers/boards/px4fmu-v4/board_config.h b/src/drivers/boards/px4fmu-v4/board_config.h
index 062f817998..b8fa362f6e 100644
--- a/src/drivers/boards/px4fmu-v4/board_config.h
+++ b/src/drivers/boards/px4fmu-v4/board_config.h
@@ -160,7 +160,6 @@ __BEGIN_DECLS
 #define ADC_BATTERY_VOLTAGE_CHANNEL		2
 #define ADC_BATTERY_CURRENT_CHANNEL		3
 #define ADC_5V_RAIL_SENSE				4
-#define ADC_AIRSPEED_VOLTAGE_CHANNEL	15
 
 /* User GPIOs
  *