diff --git a/NPSimulation/Core/PhysicsList.cc b/NPSimulation/Core/PhysicsList.cc
index 9f6fa6a693ff94b238de48f9c0ac527c243496ad..c5d9324bdb81db09688c0850b10225f4ecbbdb5a 100644
--- a/NPSimulation/Core/PhysicsList.cc
+++ b/NPSimulation/Core/PhysicsList.cc
@@ -162,7 +162,7 @@ void PhysicsList::ReadConfiguration(std::string filename){
         if(name == "EmPhysicsList")
             m_EmList = str_value;
         else if(name == "DefaultCutOff")
-            defaultCutValue = value;
+            defaultCutValue = value*mm;
         else if(name == "IonBinaryCascadePhysics")
             m_IonBinaryCascadePhysics = value;
         else if(name == "NPIonInelasticPhysics")