diff --git a/drivers/iio/proximity/sx9324.c b/drivers/iio/proximity/sx9324.c
index 6e90917e3e36..70c37f664f6d 100644
--- a/drivers/iio/proximity/sx9324.c
+++ b/drivers/iio/proximity/sx9324.c
@@ -70,7 +70,8 @@
 #define SX9324_REG_AFE_PH2		0x2a
 #define SX9324_REG_AFE_PH3		0x2b
 #define SX9324_REG_AFE_CTRL8		0x2c
-#define SX9324_REG_AFE_CTRL8_RESFILTN_4KOHM 0x02
+#define SX9324_REG_AFE_CTRL8_RESERVED	0x10
+#define SX9324_REG_AFE_CTRL8_RESFILTIN_4KOHM 0x02
 #define SX9324_REG_AFE_CTRL9		0x2d
 #define SX9324_REG_AFE_CTRL9_AGAIN_1	0x08
 
@@ -795,7 +796,8 @@ static const struct sx_common_reg_default sx9324_default_regs[] = {
 	{ SX9324_REG_AFE_PH2, 0x1a },
 	{ SX9324_REG_AFE_PH3, 0x16 },
 
-	{ SX9324_REG_AFE_CTRL8, SX9324_REG_AFE_CTRL8_RESFILTN_4KOHM },
+	{ SX9324_REG_AFE_CTRL8, SX9324_REG_AFE_CTRL8_RESERVED |
+		SX9324_REG_AFE_CTRL8_RESFILTIN_4KOHM },
 	{ SX9324_REG_AFE_CTRL9, SX9324_REG_AFE_CTRL9_AGAIN_1 },
 
 	{ SX9324_REG_PROX_CTRL0,