diff --git a/config/devices.properties b/config/devices.properties
index 97f96f0..3a79aef 100644
--- a/config/devices.properties
+++ b/config/devices.properties
@@ -35,7 +35,7 @@ aperture_x=ch.psi.pshell.epics.Motor|X06DA-ES-KBOX:TRX1|||true
 collimator_x=ch.psi.pshell.epics.Motor|X06DA-ES-KBOX:TRX2|||true
 diode_z=ch.psi.pshell.epics.Motor|X06DA-ES-KBOX:TRZ3|||true
 #beamstop=ch.psi.pshell.device.MotorGroupDiscretePositioner|beamstop_x beamstop_y beamstop_z|||
-beam_ref=ch.psi.pshell.epics.ChannelDouble|X06DA-OP-BPM1:SUM|Read||true
+mono_beam=ch.psi.pshell.epics.ChannelDouble|X06DA-OP-BPM1:SUM|Read||true
 slithop=ch.psi.pshell.epics.Slit|X06DA-OP-SH1:TRX2 X06DA-OP-SH1:TRX1|||true
 th1=ch.psi.pshell.epics.Motor|X06DA-OP-MO1:ROX1|||true
 th2=ch.psi.pshell.epics.Motor|X06DA-OP-MO1:ROX2|||true