diff --git a/Simulation/G4Extensions/G4ExternalDecay/src/Pythia8ForDecays.cxx b/Simulation/G4Extensions/G4ExternalDecay/src/Pythia8ForDecays.cxx
index d30a0e9e8c83bd2e490890964f2796f66eac39d7..c5173dcb754dd5d7b1fa06e61256355d82569f5c 100644
--- a/Simulation/G4Extensions/G4ExternalDecay/src/Pythia8ForDecays.cxx
+++ b/Simulation/G4Extensions/G4ExternalDecay/src/Pythia8ForDecays.cxx
@@ -22,7 +22,7 @@
 #include "G4ParticleTable.hh"
 #include "G4ThreeVector.hh"
 #include "TLorentzVector.h"
-#include "MCUtils/HepMCUtils.h"
+#include "MCUtils/PIDUtils.h"
 
 // STL includes
 #include <cstdlib>