diff --git a/script/optics/FrontEndBladeScanKei.py b/script/optics/FrontEndBladeScanKei.py
index 698bc087..aec6331a 100644
--- a/script/optics/FrontEndBladeScanKei.py
+++ b/script/optics/FrontEndBladeScanKei.py
@@ -6,7 +6,7 @@ keithley 2: RMU
 
 import time
 
-SENSORS = (RefCurrent)
+SENSORS = (RefCurrent,)
 STARTPOS = (-1.5)
 ENDPOS = (+1.5)
 STEPS = 0.01
@@ -43,7 +43,7 @@ caput("X03DA-PGM:rontheta.A", +87.0)
 #MonoBeta.waitValueInRange(-87.01, -86.99, 100000)
 #MonoTheta.waitValueInRange(+86.99, +87.01, 100000)
 
-POSITIONERS = (FrontendBladeUp)
+POSITIONERS = (FrontendBladeUp,)
 FrontendBladeUp.write(STARTPOS)
 FrontendBladeDown.write(-2.0)
 time.sleep(5.0)