diff --git a/script/CalibrateGonio.py b/script/CalibrateGonio.py
index c180bc5..0627f56 100644
--- a/script/CalibrateGonio.py
+++ b/script/CalibrateGonio.py
@@ -21,7 +21,7 @@ EnergyAbsolut2=caget("X10DA-OP1-MO1:ENC-ROTXEnergy.VAL")
 
 print ("BeforeCalibration", EnergyGonio2,EnergyAbsolut2)
 
-NewOffset=OldOffset-BraggGonio2+BraggGonio1
+NewOffset=OldOffset+BraggGonio2-BraggGonio1
 caput("X10DA-OP1-MO1:ROTX.OFF", NewOffset)
 time.sleep(sleepTime)
 EnergyGonio=caget("X10DA-OP1-MO1:BraggERdbkAO")