diff --git a/src/main.c b/src/main.c
index 1b93fb5..4f1b594 100644
--- a/src/main.c
+++ b/src/main.c
@@ -654,7 +654,8 @@ static float zh_bme280_compensate_temperature(int32_t adc_t)
 
 static float zh_bme280_compensate_pressure(int32_t adc_p)
 {
-    int32_t dig_p1 = (int32_t)(bme280_calib[7] << 8 | bme280_calib[6]);
+    int32_t dig_p1 = (int32_t)(uint16_t)(bme280_calib[7] << 8 | bme280_calib[6]);
+    // int32_t dig_p1 = (int32_t)(bme280_calib[7] << 8 | bme280_calib[6]);
     int32_t dig_p2 = (int16_t)(bme280_calib[9] << 8 | bme280_calib[8]);
     int32_t dig_p3 = (int16_t)(bme280_calib[11] << 8 | bme280_calib[10]);
     int32_t dig_p4 = (int16_t)(bme280_calib[13] << 8 | bme280_calib[12]);