diff --git a/config/devices.properties b/config/devices.properties
index fcaafa5..961161c 100644
--- a/config/devices.properties
+++ b/config/devices.properties
@@ -42,4 +42,4 @@ oa=ch.psi.pshell.epics.Motor|X04SA-ES3-XPS:OMEGAA|||true
 fourcv=ch.psi.pshell.device.MotorGroupBase|alpha delta gamma omegaV|||
 $energy=ch.psi.pshell.epics.Positioner|X04SA-DCM:E X04SA-DCM:E-READ|||true
 transm=ch.psi.pshell.epics.ControlledVariable|X04SA-ES2-FI:TRANSM-SET X04SA-ES2-FI:TRANSM|||true
-shutter=ch.psi.pshell.epics.DiscretePositioner|X04SA-ES3-SC:LEVEL|||true
+shutter=ch.psi.pshell.epics.ChannelString|X04SA-ES3-SC:LEVEL|||true