diff --git a/cage_func.py b/cage_func.py
index 988322c..da7dbb1 100644
--- a/cage_func.py
+++ b/cage_func.py
@@ -135,7 +135,7 @@ class Axis:
 
         # determine voltage limit to be set on PSU, must be high enough to not limit the current:
         # min. 8V, max. max_volts, in-between as needed with current value (+margin to not limit current)
-        maxVoltage = min(max(1.3 * value * self.resistance, 8), self.max_volts)  # limit voltage
+        maxVoltage = min(max(1.3 * abs(value) * self.resistance, 8), self.max_volts)  # limit voltage
         if self.connected == "Connected":  # only try to command the PSU if its actually connected
             self.device.set_current(abs(value), self.channel)  # set desired current
             self.device.set_voltage(maxVoltage, self.channel)  # set voltage limit