diff --git a/Trigger/TrigT1/L1CaloFEX/L1CaloFEXSim/python/L1CaloFEXSimCfg.py b/Trigger/TrigT1/L1CaloFEX/L1CaloFEXSim/python/L1CaloFEXSimCfg.py
index ae3b6af8fc444920e0272f899e0af164ccc0ada6..b51a976037e8d61b57a939d46e239879d6d50814 100644
--- a/Trigger/TrigT1/L1CaloFEX/L1CaloFEXSim/python/L1CaloFEXSimCfg.py
+++ b/Trigger/TrigT1/L1CaloFEX/L1CaloFEXSim/python/L1CaloFEXSimCfg.py
@@ -189,6 +189,10 @@ def L1CaloFEXSimCfg(flags, eFexTowerInputs = ["L1_eFexDataTowers","L1_eFexEmulat
         gFEXInputs.gSuperCellTowerMapperTool.SCellMasking = not flags.Input.isMC
 
         gFEX = CompFactory.LVL1.gFEXDriver('gFEXDriver')
+        
+        # The line below is a patch for (ATR-28066) - NEEDS to be cleaned up!
+        gFEX.gSuperCellTowerMapperTool = CompFactory.LVL1.gSuperCellTowerMapper('gSuperCellTowerMapper', SCell=sCellType)
+        
         gFEX.gFEXSysSimTool = CompFactory.LVL1.gFEXSysSim('gFEXSysSimTool')
         acc.addEventAlgo(gFEXInputs)
         acc.addEventAlgo(gFEX)