diff --git a/Simulation/ISF/ISF_SimulationSelectors/python/ISF_SimulationSelectorsConfig.py b/Simulation/ISF/ISF_SimulationSelectors/python/ISF_SimulationSelectorsConfig.py
index 32d425c98a8b4ab274740290eaef09c967d0f41a..6c6900c4f7f6f8c2f36d86631b38675db31158b0 100644
--- a/Simulation/ISF/ISF_SimulationSelectors/python/ISF_SimulationSelectorsConfig.py
+++ b/Simulation/ISF/ISF_SimulationSelectors/python/ISF_SimulationSelectorsConfig.py
@@ -143,7 +143,7 @@ def getNeutralGeant4Selector(name="ISF_NeutralGeant4Selector", **kwargs):
 
 def getProtonAFIIGeant4Selector(name="ISF_ProtonAFIIGeant4Selector", **kwargs):
     kwargs.setdefault('MaxMom'          , 750)
-    kwargs.setdefault('ParticlePDG'     , 2112)
+    kwargs.setdefault('ParticlePDG'     , 2212)
     kwargs.setdefault('Simulator'       , 'ISF_AFIIGeant4SimSvc')
     kwargs.setdefault('SimulationFlavor', SimulationFlavor.Geant4)
     return CfgMgr.ISF__KinematicSimSelector(name, **kwargs)