diff --git a/script/KeithleyVoltageScan.py b/script/KeithleyVoltageScan.py
index 3e721b4b..ba94b946 100644
--- a/script/KeithleyVoltageScan.py
+++ b/script/KeithleyVoltageScan.py
@@ -5,7 +5,7 @@ Keithley voltage scan
 
 POSITIONERS = (Keithley2Voltage)
 SENSORS = (Counts, SampleCurrent, RefCurrent, MachineCurrent, EnergyDistribution, AngleDistribution, Scienta.dataMatrix)
-POSITIONS = (15.,-15.)
+POSITIONS = (-15.,15.)
 STEPS = 1.0
 LATENCY = 1.0
 RELATIVE = False