diff --git a/Simulation/FastShower/FastCaloSim/python/FastCaloSimFactory.py b/Simulation/FastShower/FastCaloSim/python/FastCaloSimFactory.py
index d748f266f8caa9f8b75f4170249638286e735594..f6b8a8a5332e741afa1c86bdea21bd8f38901783 100644
--- a/Simulation/FastShower/FastCaloSim/python/FastCaloSimFactory.py
+++ b/Simulation/FastShower/FastCaloSim/python/FastCaloSimFactory.py
@@ -53,12 +53,7 @@ def FastCaloSimFactory(name="FastCaloSimFactory", **kwargs):
         ParticleParametrizationFileName=""
     
     if ParticleParametrizationFileName=="" and len(theFastShowerCellBuilderTool.AdditionalParticleParametrizationFileNames)==0:
-        try:
-            ATLASCALDATA=os.environ["ATLASCALDATA"]
-            ParticleParametrizationFileName=ATLASCALDATA+"/FastCaloSim/v1/ParticleEnergyParametrization.root"
-        except:
-            ATLASCALDATA=""
-            ParticleParametrizationFileName="ParticleEnergyParametrization.root"
+        ParticleParametrizationFileName="FastCaloSim/v1/ParticleEnergyParametrization.root"
 
     theFastShowerCellBuilderTool.ParticleParametrizationFileName=ParticleParametrizationFileName     
     mlog.info("ParticleParametrizationFile=%s",ParticleParametrizationFileName)