diff --git a/drivers/thermal/mediatek/auxadc_thermal.c b/drivers/thermal/mediatek/auxadc_thermal.c
index 8b0edb204844..9ee2e7283435 100644
--- a/drivers/thermal/mediatek/auxadc_thermal.c
+++ b/drivers/thermal/mediatek/auxadc_thermal.c
@@ -690,6 +690,9 @@ static const struct mtk_thermal_data mt7986_thermal_data = {
 	.adcpnp = mt7986_adcpnp,
 	.sensor_mux_values = mt7986_mux_values,
 	.version = MTK_THERMAL_V3,
+	.apmixed_buffer_ctl_reg = APMIXED_SYS_TS_CON1,
+	.apmixed_buffer_ctl_mask = GENMASK(31, 6) | BIT(3),
+	.apmixed_buffer_ctl_set = BIT(0),
 };
 
 static bool mtk_thermal_temp_is_valid(int temp)