diff --git a/src/SparkFunBME280.cpp b/src/SparkFunBME280.cpp
index b1136c3..e1cc7d5 100644
--- a/src/SparkFunBME280.cpp
+++ b/src/SparkFunBME280.cpp
@@ -475,6 +475,11 @@ float BME280::readFloatAltitudeMeters( void )
// see NRLMSISE-00. That's why it is the "international" formula, not "interplanetary".
// Sparkfun is not liable for incorrect altitude calculations from this
// code on those planets. Interplanetary selfies are welcome, however.
+
+ // firstly read temperature for avoiding wrong calculation
+ readFloatPressure();
+ readTempC();
+
heightOutput = ((float)-44330.77)*(pow(((float)readFloatPressure()/(float)_referencePressure), 0.190263) - (float)1); //Corrected, see issue 30
return heightOutput;
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