diff --git a/DDG4/edm4hep/Geant4Output2EDM4hep.cpp b/DDG4/edm4hep/Geant4Output2EDM4hep.cpp
index 537c6b3c19516a0dd9d6a4e009f271b2df689834..3fd3619281a510823dedbcb666a627964b3ceeab 100644
--- a/DDG4/edm4hep/Geant4Output2EDM4hep.cpp
+++ b/DDG4/edm4hep/Geant4Output2EDM4hep.cpp
@@ -26,6 +26,7 @@
 #include <edm4hep/SimCalorimeterHitCollection.h>
 #include <edm4hep/EDM4hepVersion.h>
 /// podio include files
+#include <podio/CollectionBase.h>
 #include <podio/podioVersion.h>
 #include <podio/Frame.h>
 #if PODIO_BUILD_VERSION >= PODIO_VERSION(0, 99, 0)