diff --git a/EM7180_MPU9250+BMP280.ino b/EM7180_MPU9250+BMP280.ino
index 84e0fd4..e35db5c 100644
--- a/EM7180_MPU9250+BMP280.ino
+++ b/EM7180_MPU9250+BMP280.ino
@@ -1538,9 +1538,9 @@ void MPU9250SelfTest(float * destination) // Should return percent deviation fro
    
   writeByte(MPU9250_ADDRESS, SMPLRT_DIV, 0x00);    // Set gyro sample rate to 1 kHz
   writeByte(MPU9250_ADDRESS, CONFIG, 0x02);        // Set gyro sample rate to 1 kHz and DLPF to 92 Hz
-  writeByte(MPU9250_ADDRESS, GYRO_CONFIG, 1<<FS);  // Set full scale range for the gyro to 250 dps
+  writeByte(MPU9250_ADDRESS, GYRO_CONFIG, FS<<3);  // Set full scale range for the gyro to 250 dps
   writeByte(MPU9250_ADDRESS, ACCEL_CONFIG2, 0x02); // Set accelerometer rate to 1 kHz and bandwidth to 92 Hz
-  writeByte(MPU9250_ADDRESS, ACCEL_CONFIG, 1<<FS); // Set full scale range for the accelerometer to 2 g
+  writeByte(MPU9250_ADDRESS, ACCEL_CONFIG, FS<<3); // Set full scale range for the accelerometer to 2 g
 
   for( int ii = 0; ii < 200; ii++) {  // get average current values of gyro and acclerometer