diff --git a/NPSimulation/src/EventGeneratorIsotropic.cc b/NPSimulation/src/EventGeneratorIsotropic.cc
index 3e0c78171a2f0cc31e3760e7e92dd384fbf32433..b6923225f8ac76376c2bd3494bded901fb79c6ef 100644
--- a/NPSimulation/src/EventGeneratorIsotropic.cc
+++ b/NPSimulation/src/EventGeneratorIsotropic.cc
@@ -152,7 +152,7 @@ void EventGeneratorIsotropic::ReadConfiguration(string Path,int){
         G4cout << "z0 " << m_z0 << " mm" << G4endl;
       }
       
-      else if (DataBuffer=="Particle=") {
+      else if (DataBuffer=="Particle=" || DataBuffer=="particle=") {
         check_particle = true ;
         ReactionFile >> m_particleName;
         G4cout << "Particle : " << m_particleName << endl ;