diff --git a/script/XAS.py b/script/XAS.py
index 2aa1d57f..f817e2b8 100644
--- a/script/XAS.py
+++ b/script/XAS.py
@@ -24,7 +24,7 @@ def trig():
 
 try:
     #prepare_keithleys(DWELL)
-    lscan(POSITIONERS, SENSORS, STARTPOS, ENDPOS, STEPSIZE, LATENCY, before_read=before_readout, after_read=after_readout)
+    lscan(POSITIONERS, SENSORS, STARTPOS, ENDPOS, STEPSIZE, LATENCY, before_read=trig, after_read=after_readout)
 finally:
     if ENDSCAN:
         after_scan()