diff --git a/DDSim/Helper/LCIO.py b/DDSim/Helper/LCIO.py
index 8024078594cc4ec227df80f70c04c6d0271c9b18..fa66d9329f873b82606638ca5cee616df098e37a 100644
--- a/DDSim/Helper/LCIO.py
+++ b/DDSim/Helper/LCIO.py
@@ -6,16 +6,16 @@ class LCIO( Input ):
   """Configuration for the generator-level InputFiles"""
   def __init__( self ):
     super(LCIO, self).__init__()
-    self._parameters["mcParticleCollectionName"] = "MCParticle"
+    self._parameters["MCParticleCollectionName"] = "MCParticle"
 
   @property
   def mcParticleCollectionName( self ):
     """Set the name of the collection containing the MCParticle input.
     Default is "MCParticle".
     """
-    return self._parameters["mcParticleCollectionName"]
+    return self._parameters["MCParticleCollectionName"]
   
   @mcParticleCollectionName.setter
   def mcParticleCollectionName( self, val ):
-    self._parameters["mcParticleCollectionName"] = val
+    self._parameters["MCParticleCollectionName"] = val