diff --git a/config/devices.properties b/config/devices.properties
index bc3daca..32e87ed 100644
--- a/config/devices.properties
+++ b/config/devices.properties
@@ -1,4 +1,4 @@
-apertureX=ch.psi.pshell.epics.Motor X10SA-ES-MIC:TRX1 false
+$apertureX=ch.psi.pshell.epics.Motor X10SA-ES-MIC:TRX1 false
 apertureY=ch.psi.pshell.epics.Motor X10SA-ES-MIC:TRY1 false
 beamstopX=ch.psi.pshell.epics.Motor X10SA-ES-BS:TRX1 false
 beamstopY=ch.psi.pshell.epics.Motor X10SA-ES-BS:TRY1 false