diff --git a/platforms/nuttx/src/px4/nxp/s32k3xx/include/px4_arch/hw_description.h b/platforms/nuttx/src/px4/nxp/s32k3xx/include/px4_arch/hw_description.h
index 9ae0300f27..e6d854bef3 100644
--- a/platforms/nuttx/src/px4/nxp/s32k3xx/include/px4_arch/hw_description.h
+++ b/platforms/nuttx/src/px4/nxp/s32k3xx/include/px4_arch/hw_description.h
@@ -245,6 +245,8 @@ enum class Bus {
 using CS = GPIO::GPIOPin;
 using DRDY = uint32_t;
 
+#define DRDYInvalid 0
+
 struct bus_device_external_cfg_t {
 	CS cs_gpio;
 	DRDY drdy_gpio;
diff --git a/platforms/nuttx/src/px4/nxp/s32k3xx/include/px4_arch/spi_hw_description.h b/platforms/nuttx/src/px4/nxp/s32k3xx/include/px4_arch/spi_hw_description.h
index 5613a1c328..6d9152adfb 100644
--- a/platforms/nuttx/src/px4/nxp/s32k3xx/include/px4_arch/spi_hw_description.h
+++ b/platforms/nuttx/src/px4/nxp/s32k3xx/include/px4_arch/spi_hw_description.h
@@ -45,7 +45,7 @@ static inline constexpr px4_spi_bus_device_t initSPIDevice(uint32_t devid, SPI::
 	px4_spi_bus_device_t ret{};
 	ret.cs_gpio = getGPIOPort(cs_gpio.port) | getGPIOPin(cs_gpio.pin) | (GPIO_LOWDRIVE | GPIO_OUTPUT_ONE);
 
-	if (drdy_gpio != 0) {
+	if (drdy_gpio != DRDYInvalid) {
 		ret.drdy_gpio = drdy_gpio;
 	}