diff --git a/20240709SerdarModScript.py b/20240709SerdarModScript.py
index 61f70dd..c9a6624 100644
--- a/20240709SerdarModScript.py
+++ b/20240709SerdarModScript.py
@@ -575,7 +575,7 @@ def sweep_b_val(instr:pyvisa.resources.Resource, min_bval:float, max_bval:float,
 # TODO: write a function that simultaneously controls the two power supplies and perform the rotation of the B-field. => Threading
 # in function head should be func(instr1, instr2, args1, kwargs1, args2, kwargs2)
 def b_field_rotation(instr1:pyvisa.resources.Resource, instr2:pyvisa.resources.Resource,
-                     Babs:float, startangle:float, endangle:float, angle_stepsize:float, clockwise=True)->None:
+                     Babs:float, startangle:float, endangle:float, angle_stepsize:float, clockwise=True, sweepdown=False)->None:
     pass
 
 ################################################################# END OF FUNCTION DEFS ###########################################################################################