diff --git a/drivers/bmx280/include/bmx280_internals.h b/drivers/bmx280/include/bmx280_internals.h
index a6ad851f95..fddc6577ca 100644
--- a/drivers/bmx280/include/bmx280_internals.h
+++ b/drivers/bmx280/include/bmx280_internals.h
@@ -113,7 +113,7 @@ extern "C" {
  * @{
  */
 #define CALIB_T_P_BASE                  (BMX280_DIG_T1_LSB_REG)
-#define CALIB_T_P_LEN                   (32U) /* might be larger than needed */
+#define CALIB_T_P_LEN                   (24U)
 #define OFFSET_T_P(x)                   (x - CALIB_T_P_BASE)
 #if defined(MODULE_BME280_SPI) || defined(MODULE_BME280_I2C)
 #define CALIB_H_BASE                    (BME280_DIG_H2_LSB_REG)