diff --git a/drivers/iio/adc/cpcap-adc.c b/drivers/iio/adc/cpcap-adc.c
index 6e419d5a7c14..f153e02686a0 100644
--- a/drivers/iio/adc/cpcap-adc.c
+++ b/drivers/iio/adc/cpcap-adc.c
@@ -1012,7 +1012,7 @@ static int cpcap_adc_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, indio_dev);
 
 	ddata->irq = platform_get_irq_byname(pdev, "adcdone");
-	if (!ddata->irq)
+	if (ddata->irq < 0)
 		return -ENODEV;
 
 	error = devm_request_threaded_irq(&pdev->dev, ddata->irq, NULL,