diff --git a/SetAthosUndEnergy.py b/SetAthosUndEnergy.py
index 39267e3..2155679 100755
--- a/SetAthosUndEnergy.py
+++ b/SetAthosUndEnergy.py
@@ -24,7 +24,7 @@ sleep(1) # give PVs some time to connect
 print("before:", und)
 print("target:", clargs.energy, "eV")
 print("actual change is commented out!")
-#und.set(clargs.energy)
+#und.set(clargs.energy).wait()
 print("after: ", und)