diff --git a/drivers/iio/adc/ti-ads1298.c b/drivers/iio/adc/ti-ads1298.c
index 25261163d3e2..69911b0cde84 100644
--- a/drivers/iio/adc/ti-ads1298.c
+++ b/drivers/iio/adc/ti-ads1298.c
@@ -66,7 +66,7 @@
 #define ADS1298_MASK_CONFIG3_VREF_4V		BIT(5)
 
 #define ADS1298_REG_LOFF	0x04
-#define ADS1298_REG_CHnSET(n)	(0x05 + n)
+#define ADS1298_REG_CHnSET(n)	(0x05 + (n))
 #define ADS1298_MASK_CH_PD		BIT(7)
 #define ADS1298_MASK_CH_PGA		GENMASK(6, 4)
 #define ADS1298_MASK_CH_MUX		GENMASK(2, 0)