diff --git a/site_ansto/instrument/bilby/config/motors/tank.sct b/site_ansto/instrument/bilby/config/motors/tank.sct
index 9e15c729..93a4cf70 100644
--- a/site_ansto/instrument/bilby/config/motors/tank.sct
+++ b/site_ansto/instrument/bilby/config/motors/tank.sct
@@ -94,5 +94,6 @@ driver tank = {
 #
   code mkDriver = {
 @   ::utility::mkVar vessel_y float user vessel_y true instrument true true
+@   sicslist setatt vessel_y klass instrument
   }
-};
+}