diff --git a/Simulation/SimulationJobOptions/share/g4/preInclude.Run3G4Optimiziations.py b/Simulation/SimulationJobOptions/share/g4/preInclude.Run3G4Optimiziations.py
index 831c0a7381da4f2ae3059b40ecffa02fc170acbb..fa276e6412d953b91fa34f22468b12d7d86e7adb 100644
--- a/Simulation/SimulationJobOptions/share/g4/preInclude.Run3G4Optimiziations.py
+++ b/Simulation/SimulationJobOptions/share/g4/preInclude.Run3G4Optimiziations.py
@@ -44,7 +44,7 @@ else:
 #
 #########################################################
 
-nrr_threshold = 1. # MeV
+nrr_threshold = 2. # MeV
 nrr_weight = 10.
 
 from G4AtlasApps.SimFlags import simFlags