diff --git a/ophyd_devices/utils/bec_roi_signals/ad_roi_signal.py b/ophyd_devices/utils/bec_roi_signals/ad_roi_signal.py
index 25fe757..e37bdb3 100644
--- a/ophyd_devices/utils/bec_roi_signals/ad_roi_signal.py
+++ b/ophyd_devices/utils/bec_roi_signals/ad_roi_signal.py
@@ -150,8 +150,8 @@ NDPLUGIN_STATS_CONFIG: LITERAL_ROI_PROCESSING_CONFIG = {
 class ADROIProcessing(ROIProcessing):
     """ROI processing signal for AD detector setups at PSI."""
 
-    roi1 = Cpt(ROIPlugin, prefix="ROI1:", kind="normal")
-    stats1 = Cpt(StatsPlugin, prefix="STATS1:", kind="normal")
+    roi1 = Cpt(ROIPlugin, "ROI1:", kind="normal")
+    stats1 = Cpt(StatsPlugin, "STATS1:", kind="normal")
 
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)