diff --git a/ADwinProII/labscript_devices_ADwin_modules.py b/ADwinProII/labscript_devices_ADwin_modules.py
index b8ac52005abeff6eabe6ec0975deb7320feab5c9..6c11b2b9fe9525620620336fbc8587eb947db79c 100644
--- a/ADwinProII/labscript_devices_ADwin_modules.py
+++ b/ADwinProII/labscript_devices_ADwin_modules.py
@@ -230,7 +230,7 @@ class ADwinAnalogIn(AnalogIn):
     description = 'ADwin Analog Input'
     
    
-    def acquire(self,label,start_time,end_time,wait_label='',scale_factor=None,units=None,storage_rate=None):
+    def acquire(self,label,start_time,end_time,wait_label='',storage_rate=None):
         """Command an acquisition for this input.
 
         Args: