diff --git a/config/devices.properties b/config/devices.properties
index 1d7a042a..58989d2d 100644
--- a/config/devices.properties
+++ b/config/devices.properties
@@ -81,7 +81,7 @@ MonoEnergy=ch.psi.pshell.epics.ChannelDouble|X03DA-PGM:CERBK|Read||true
 MonoCff=ch.psi.pshell.epics.ChannelDouble|X03DA-PGM:rbkcff|Read||true
 MonoBeta=ch.psi.pshell.epics.ChannelDouble|X03DA-PGM:rbkbeta|Read||true
 MonoTheta=ch.psi.pshell.epics.ChannelDouble|X03DA-PGM:rbktheta|Read||true
-ExitSlit=ch.psi.pshell.epics.ChannelDouble|X03DA-OP-EXS:AP|Read||true
+ExitSlit=ch.psi.pshell.epics.ChannelDouble|X03DA-OP-EXS:AP|||false
 ExitSlitY=ch.psi.pshell.epics.Motor|X03DA-OP-EXS:Y|||
 FocusWaterTemp=ch.psi.pshell.epics.ChannelDouble|X03DA-PC-HUBER:TEMP-I-RBV|Read||true
 AuxVoltage=ch.psi.pshell.epics.ChannelDouble|X03DA-OP:CADC4|Read||true