diff --git a/src/drivers/boards/px4fmu-v4pro/board_config.h b/src/drivers/boards/px4fmu-v4pro/board_config.h
index 7a08d72609..a7927fb0d9 100644
--- a/src/drivers/boards/px4fmu-v4pro/board_config.h
+++ b/src/drivers/boards/px4fmu-v4pro/board_config.h
@@ -328,8 +328,8 @@ __BEGIN_DECLS
 #define BOARD_ADC_BRICK_VALID   (px4_arch_gpioread(GPIO_VDD_BRICK_VALID))
 #define BOARD_ADC_BRICK2_VALID  (px4_arch_gpioread(GPIO_VDD_BRICK2_VALID))
 #define BOARD_ADC_SERVO_VALID   (1)
-#define BOARD_ADC_PERIPH_5V_OC  (px4_arch_gpioread(GPIO_VDD_5V_PERIPH_OC))
-#define BOARD_ADC_HIPOWER_5V_OC (px4_arch_gpioread(GPIO_VDD_5V_HIPOWER_OC))
+#define BOARD_ADC_PERIPH_5V_OC  (!px4_arch_gpioread(GPIO_VDD_5V_PERIPH_OC))
+#define BOARD_ADC_HIPOWER_5V_OC (!px4_arch_gpioread(GPIO_VDD_5V_HIPOWER_OC))
 
 #define BOARD_HAS_PWM	DIRECT_PWM_OUTPUT_CHANNELS