diff --git a/DDG4/src/Geant4Converter.cpp b/DDG4/src/Geant4Converter.cpp
index 967fce18ba9a58a04c8025ae6ca846fea38932dc..6317cf5ad5725cc4cf7e50b2863fa1865f6e1755 100644
--- a/DDG4/src/Geant4Converter.cpp
+++ b/DDG4/src/Geant4Converter.cpp
@@ -92,6 +92,7 @@
 #include "G4LogicalSkinSurface.hh"
 #include "G4LogicalBorderSurface.hh"
 #include "G4MaterialPropertiesTable.hh"
+#include "G4MaterialPropertiesIndex.hh"
 #include "CLHEP/Units/SystemOfUnits.h"
 
 // C/C++ include files