diff --git a/script/daq/PumpProbeXES_W1_v4.py b/script/daq/PumpProbeXES_W1_v4.py
index b623504..cb2be2d 100644
--- a/script/daq/PumpProbeXES_W1_v4.py
+++ b/script/daq/PumpProbeXES_W1_v4.py
@@ -100,7 +100,7 @@ def run_aquisition():
     sleep(0.1)
 
 def before_sample():
-    DELAY.write(DealyOn)
+    DELAY.write(DelayOn)
     run_aquisition()