diff --git a/src/mx_bluesky/bimorph_optimisation_plan/pencil_beam_scan_2d_slit_plan.py b/src/mx_bluesky/bimorph_optimisation_plan/pencil_beam_scan_2d_slit_plan.py
index c47498eb0..850bf1ab0 100644
--- a/src/mx_bluesky/bimorph_optimisation_plan/pencil_beam_scan_2d_slit_plan.py
+++ b/src/mx_bluesky/bimorph_optimisation_plan/pencil_beam_scan_2d_slit_plan.py
@@ -35,8 +35,8 @@ class CentroidDevice(Device):
         valutes_to_average: Number of reads centroid will do, then take mean
     """
 
-    centroid_x_rbv: EpicsSignalRO = Component(EpicsSignalRO, "CentroidX_RBV")
-    centroid_y_rbv: EpicsSignalRO = Component(EpicsSignalRO, "CentroidY_RBV")
+    centroid_x_rbv: Component = Component(EpicsSignalRO, "CentroidX_RBV")
+    centroid_y_rbv: Component = Component(EpicsSignalRO, "CentroidY_RBV")
 
     values_to_average = 1