diff --git a/csaxs_bec/devices/epics/fast_shutter.py b/csaxs_bec/devices/epics/fast_shutter.py
index 9064b15..0009550 100644
--- a/csaxs_bec/devices/epics/fast_shutter.py
+++ b/csaxs_bec/devices/epics/fast_shutter.py
@@ -5,7 +5,7 @@ that can be monitored to check the shutter status as it may be controlled direct
 the delay generator."""
 
 from ophyd import Component as Cpt
-from ophyd import Device, EpicsSignal, Kind
+from ophyd import Device, EpicsSignal, EpicsSignalRO, Kind
 
 
 class cSAXSFastEpicsShutter(Device):
@@ -19,7 +19,7 @@ class cSAXSFastEpicsShutter(Device):
 
     # PVs
     shutter = Cpt(EpicsSignal, "OUT_01", kind=Kind.normal, auto_monitor=True)
-    shutter_readback = Cpt(EpicsSignal, "IN_01", kind=Kind.normal, auto_monitor=True)
+    shutter_readback = Cpt(EpicsSignalRO, "IN_01", kind=Kind.normal, auto_monitor=True)
 
     # -----------------------------------------------------
     # User-facing shutter control functions